Flexible back shaver

ABSTRACT

A back shaver has a body shaver handle and a flexible coupling for a blade cartridge comprising a sharp blade. The flexible coupling uses a material that allows the blade cartridge to pivot with respect to the body shaver handle. In some alternatives the flexible coupling uses rubber or another flexible material. In other alternatives the flexible coupling uses a mechanical pivot mechanism located near the inner side at an end of body shaver handle opposite the handle end and allowing the blade cartridge to move and pivot at alternate angles when pressed against a skin surface. The mechanical pivot mechanism can be located at in the blade cartridge or in the body shaver handle.

The instant patent application is a Divisional (DIV) from U.S. patentapplication Ser. No. 15/156,868 filed on May 17, 2016 by the sameinventor which was a Continuation-in-part (CIP) of U.S. Pat. No.9,718,200 granted Aug. 1, 2017 from U.S. patent application Ser. No.14/170,269 filed on Jan. 31, 2014 by the same inventor.

The instant patent application is also a Divisional (DIV) from U.S.patent application Ser. No. 15/162,606 filed on May 23, 2016 by the sameinventor, and U.S. Ser. No. 15/162,606 was a Continuation-in-part (CIP)of U.S. Pat. No. 9,718,200 granted Aug. 1, 2017 from U.S. patentapplication Ser. No. 14/170,269 filed on Jan. 31, 2014 by the sameinventor, and U.S. Ser. No. 15/162,606 was also a Continuation (CON)from U.S. patent application Ser. No. 15/156,816 filed on May 17, 2016by the same inventor.

BACKGROUND OF THE INVENTIONS 1. Technical Field

The present inventions relate to body shavers and, more particularly,relate to handle couplings for body shavers.

2. Description of the Related Art

Safety razor blades have had assemblies where a cutting blade issurrounded by flexible portions or guards within a construction assemblyused to house the cutting blade and are generally flexible for thepurposes of temporarily allowing a greater cutting blade exposure whenforce is manually applied and when force is withdrawn the cutting bladeexhibits less exposure. The cutting blades within these prior safetyrazor blades are typically fastened rigidly in order to disallow thecutting blade to move in relation to the housing cartridge of the safetyrazor blade. We often see the housing or cartridge of the prior safetyrazors adjusting in order to contour to challenging surfaces while theblade is anchored in place for the purpose of remaining rigid. Thesecharacteristics prove beneficial in creating and allowing for a cleanclose shave cutting hairs as close as possible. Therefore, getting thecleanest and closest shave is often a primary competitive factor betweenshaving companies. In fact, in today's market we even see multiple rowsof cutting blades rigidly in place in order to continue this trend.Because of the closeness these safety razors offer and because of thelevel of cutting blade exposure to one's skin we find that shaving creamis a necessary promoted lubricant in the shaving method in order toprevent cutting or bleeding. These safety razors were typically createdfor men who seek to shave their face as well as women who seek to shavetheir legs. Most prior art configurations illustrate flexible guards ora safety razor cartridge housing in order to safely contour a straightedge razor along the many curves that typically exist on a face of a manor legs of a woman while cutting hair as close as possible in order topromote the smoothest shave attainable.

Examples of safety blade prior art are exhibited herein. One example isillustrated in U.S. Pat. No. 3,500,539 by Muros.

Another example of a prior art is U.S. Pat. No. 4,409,735 by Cartwright,wherein we see a shaving geometry that promotes a flexible cutting bladecartridge that offers more controlled flexibility when protruding a skinsurface along the elongated side.

Yet another prior art is EP Patent 1,537,964 by Pennella et al., whereinwe see a wet shaving geometry that incorporates guard elements. Theguard elements are staggered alongside the sharp edge of the razor whileperpendicular and bisecting each razor row.

Yet another prior art is U.S. Pat. No. 5,031,316 by Oldroyd wherein wesee another illustration wherein a supporting member or guard surroundsthe flexible cutting blade allowing a level of protection while thesharp edge of the cutting blade protrudes the skin surface.

Yet another prior art is U.S. Pat. No. 2,670,533 by Kearney, wherein wesee another illustration that similar to the U.S. Pat. No. 3,500,539 byMuros wherein the cutting blade protrudes into a skin surface which inturn allows an overexposure of a rigid cutting blade.

Yet another prior art is U.S. Pat. No. 2,725,886 by Gagliano, whereinthere is illustrated a comb or like structure used for cutting ortrimming hair on one's head but the prior art does not have a supportinginner guard, pre-determined base, nor a void used to assist in creatingthe shaving geometry illustrated in embodiments of the presentinventions.

Yet another prior art is U.S. Pat. No. 6,094,820 by Adachi, whereinthere is illustrated a razor comb blade unit intended for cutting ortrimming hair on one′. However, the cutting blade in this example isslidably held in the blade holder leaving no base, void or gap to allowa desired cutting blade flexibility as described in the embodiments ofthe present inventions.

Yet another prior art is U.S. Pat. No. 8,413,334 by Walker, whereinthere is illustrated a more recent art form where we are presented againa purposely rigid cutting blade that is rigidly anchored into place inorder to allow the safety blade housing or cartridge to alone provide alevel of safety through the depth margin of slots or grooves betweeneach tooth in the comb guard.

When shaving the body skin it is also difficult to understand whether ornot the safety razor is positioned at a correct shaving angle. It iscommonly known that there are many hills and valleys that can be foundover one's body or backside. Muscular and skeletal obstacles thatprotrude often are protruding at alternate shapes and sizes provide aneven greater challenge when attempting to shave the backside. Those whoare muscularly fit commonly have deeper cracks and crevices betweenmuscles that can be even more of a challenge. For these reasons many mendecide to settle for more expensive and painful alternatives such aswaxing or laser treatments. Not only has displaying unshaven back hairbeen deemed as “gross” or disgusting by society but it's also seen asnon-hygienic.

SUMMARY OF THE INVENTIONS

Thus, it is an object of the present inventions to provide a safetyshaving razor blade that allows wet and dry shaving capabilities and thelike.

It is still another object of the present inventions to minimizeaccidental cutting, nicking or razor burn from the sharp edge of thecutting blade which can often be negative results of shaving withoutapplying shaving cream.

It is another object of the present inventions to provide such a razorblade that will eliminate the need to use a hair trimmer prior toshaving with a straight edge razor blade.

It is yet another object of the present inventions to provide such arazor blade that will cut hair at or slightly below a skin surface butnot to the depth at which other safety razors provide. Thus, the shavinggeometry eliminates the need of shaving cream in order to protect theskin surface from cutting or nicking.

It is still another object of the present inventions to provide such arazor blade that will allow an individual the choice to choose whetherto dry shave without the application of water and/or shaving cream or tochoose to apply shaving cream or shaving lubricant and/or water to one'sback side during the shaving process such as in the shower.

It is still another object of the present inventions to allow certainindividuals who may have extremely sensitive skin or even viruses suchas MERSA the ability to shave certain areas without irritation theinfected skin surface which when using an overly exposure cutting bladetends to irritate, flare up and spread a virus.

It is still another object of the present inventions to offer a quickand easy shave during situations where a medical emergency may occur. Anexample of this could be using embodiments of the present inventions inthe effect that a medical team may need to shave an individual chest inorder to apply defibrillator in order to control heart fibrillation whenapplying an electric current to the chest wall.

It is still another object of the present inventions to eliminate theuser of batteries and moving parts which are all too often found whenusing electronic devices.

It is still another object of the present inventions to eliminate theuse of a device that possess moving parts which tends to break down andcause returns when selling through distributors, wholesalers andretailers.

It is still another object of the present inventions to offer a devicethat maintains a handle of which can accept its replacement shavingblades as well as accepts a device used to lubricate one's back with ashaving cream or gel type of lubricant prior to shaving.

It is still another object of the present inventions to offer a devicethat can be folded into a smaller more compact size that would be easilystored in a convenient space such as on the wall of one's shower andsuch. Folding the device would also prove efficient when selling inretail stores in that it would save space which is very important toretailers.

It is still another object of the present inventions to offer a shavingdevice that would allow handicapped individuals access easily andeffectively shave “hard-to-reach” areas such as their legs without theeffort that is normally required when using a traditional straight edgeshaver handle and razor blade.

It is still another object of the present inventions to create a razorblade that could act as a handle itself or adhere to a handle that couldbe used for any part of the body.

It is still another object of the present inventions to create a razorthat could prove beneficial for prepping during medical surgery or in anemergency matter time is crucial and shaving must be performed rapidly.

It is still another object of the present inventions to create a razorthat could prove beneficial for use in rehabilitation centers such asprisons or detention centers where safety is important.

There is a need for a safety razor blade with outer teeth, outer teethedge, deep void, inner guard, inner guard edge and an integrated cuttingblade whereby deep void is intermediate of cutting blade and outerteeth.

The present inventions are illustrated by way of example and are notlimited by the accompanying figures, in which like references indicatesimilar elements. Elements in the figures are illustrated for simplicityand clarity and have not necessarily been drawn to scale.

The details of the preferred embodiments and these and other objects andfeatures of the inventions will be more readily understood from thefollowing detailed description when read in conjunction with theaccompanying drawings wherein:

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic cross-sectional view of a razor blade shavinggeometry wherein a cutting blade engages alongside skin surface in afirst position according to a first embodiment of the presentinventions;

FIG. 2 is a schematic cross-sectional view of a razor blade shavinggeometry wherein a cutting blade engages an opposing force of a convexskin surface contour in a second position according to the firstembodiment of the present inventions;

FIG. 3 is a schematic cross-sectional view of razor blade shavinggeometry illustrating whereby said cutting blade is positioned inside ofa skin surface contour A at inverted skin surface contour B according toa second embodiment of the present inventions;

FIG. 4 is a schematic cross-sectional view of a razor blade shavinggeometry whereby the base is positioned in a closer distance incomparison to FIG. 1 and FIG. 2 and said cutting blade engages a convexskin surface contour according to the second embodiment of the presentinventions;

FIG. 5 is a schematic cross-sectional view of a razor blade shavinggeometry whereby said cutting blade is fastened in a fixed positioninside of the skin surface contour according to a third embodiment ofthe present inventions;

FIG. 6 is a schematic cross-sectional view of a razor blade shavinggeometry whereby said sharp edge of a cutting blade is at the skinsurface contour A in a first position and a spring is embodied in orderto prepare for a cutting blade to engage skin surface contour in asecond position according to a fourth embodiment of the presentinventions;

FIG. 7 is a schematic cross-sectional view of a razor blade shavinggeometry whereby said cutting blade is engaged in a second positioninside of the skin surface contour by a spring according to the fourthembodiment of the present inventions;

FIG. 8 is an angled elevated view of the razor blade whereby the combportion is end up according to embodiments of the present inventions;

FIG. 9 is an elevated cut-away view of the apparatus as seen in FIG. 8illustrating the comb, cutting blade and inner guard assembly accordingto embodiments of the present inventions;

FIG. 10 is an eye-level view of the apparatus of the present inventionsillustrating the comb, cutting blade and inner guard according to thefirst through fourth embodiments of the present inventions;

FIG. 11 is an elevated angled view of the present inventions whereby theinner guard is end up and apparatus is up-side down according to thefirst through fourth embodiments of the present inventions;

FIG. 12 is an elevated angled up-side down view of the presentinventions that illustrates a plurality of razor blades assembledtogether as one apparatus according to the first through fourthembodiments of the present inventions;

FIG. 13 is a side view the elongated handle by which the razor bladeattaches on the upper end to in order to reach and shave areas of thebody according to first through fourth embodiments of the presentinventions;

FIG. 14 is an side close up view of the end of the that handle wherebythe razor blade attaches according to embodiments of the presentinventions;

FIG. 15 is an elevated angled view illustrated a handle shaped toconfirm to the shape of an individuals' hand or palm according to firstthrough fourth embodiments of the present inventions;

FIG. 16 is an elevated angled view of the present inventions whereby thesafety razor is attached a handle according to first through fourthembodiments of the present inventions;

FIG. 17 is and front elevated view of the razor blade illustrating theweb coverings existing between each tooth in order to conceal shorn hairfrom view according to the first through fourth embodiments of thepresent inventions.

FIG. 18 is a view of an individual utilizing the safety razor by methodof an elongated handle according to first embodiment of the presentinventions;

FIG. 19 is a close up view of the razor blade cutting hair along theback side of an individual according to first embodiment of the presentinventions;

FIG. 20 illustrates a side view of a wet shave sponge with a handleaccording to embodiments of the present inventions;

FIG. 21 illustrates a side view of a safety razor and an elongatedhandle for tactile feedback along a skin surface plane having a bladegroup and a support according to an embodiment of the presentinventions;

FIG. 22 illustrates a front view of a safety razor and an elongatedhandle according to embodiments of the present inventions;

FIG. 23 illustrates a view on the inner side of an elongated handle anda safety razor according to embodiments of the present inventions;

FIG. 24 illustrates a rear view of a safety razor and an elongatedhandle elongated handle according to embodiments of the presentinventions;

FIG. 25 illustrates a close up side view of a safety razor of thecircled area of prior FIG. 1 according to embodiments of the presentinventions;

FIG. 26 illustrates a close up cross-sectional view of a blade group ofthe circled area of prior FIG. 5 according to embodiments of the presentinventions;

FIGS. 27-28 illustrate aerial views of a two-sided back shaver handlegripped by a user extended under the armpit towards the backsideaccording to embodiments of the present inventions;

FIG. 29 illustrates a side view of a safety razor of the circled area ofprior FIG. 7 according to embodiments of the present inventions;

FIG. 30 illustrates a close up side view of a safety razor of thecircled area of prior FIG. 8 according to embodiments of the presentinventions;

FIG. 31 illustrates a close up cross-sectional view of a blade group ofthe circled area of prior FIG. 10 according to embodiments of thepresent inventions;

FIGS. 32-33 illustrate aerial views of handles gripped by a userextended under the armpit towards the backside with two safety bladesindenting into the skin surface and triggering a sensory systemaccording to embodiments of the present inventions;

FIGS. 34-36 illustrate side views of handles gripped by a user extendedunder the armpit towards the backside according to embodiments of thepresent inventions;

FIG. 37 illustrates a side view of a blade group for removably attachingto a substrate structure of a safety razor according to embodiments ofthe present inventions;

FIG. 38 illustrates a diagram of the different muscles that are found onthe backside of the human body;

FIG. 39-41 illustrate a close up side views of a muscle divide as wasillustrated in the previous FIG. 18 and showing a safety razor andelongated handle for two-point discrimination according to embodimentsof the present inventions;

FIG. 42 illustrates a close up side view of a circled portion of a bladegroup in prior FIG. 39 according to embodiments of the presentinventions;

FIG. 43 illustrates a close up side view of a circled portion of a bladegroup in prior FIG. 40 according to embodiments of the presentinventions;

FIG. 44 illustrates a close up side view of a circled portion of a bladegroup in prior FIG. 40;

FIGS. 45-46 illustrate close up side views of a safety razor andelongated handle for tactile feedback according to embodiments of thepresent inventions;

FIG. 47 illustrates a close up side view of a safety razor and elongatedhandle for tactile feedback having an electric trimmer for a supportaccording to embodiments of the present inventions;

FIG. 48 illustrate a close up side view of a safety razor and elongatedhandle for tactile feedback having a lubrication strip for a supportaccording to embodiments of the present inventions;

FIGS. 49-50 illustrate front views of a safety razor with a channelinside of a blade group and a support according to embodiments of thepresent inventions;

FIGS. 51-52 illustrate close up side views of a safety razor andelongated handle for tactile feedback according to embodiments of thepresent inventions;

FIGS. 53-55 illustrate close up cross-sectional views of a blade groupfor tactile feedback according to embodiments of the present inventions;

FIGS. 56-57 illustrate close up views of a blade group rear surface of ablade group for tactile feedback according to embodiments of the presentinventions;

FIGS. 58-59 illustrate an eye-level view of a safety razor for tactilefeedback according to embodiments of the present inventions;

FIG. 60 illustrates a front view of an alternate embodiment of a safetyrazor with a skeletal structure according to embodiments of the presentinventions; and

FIG. 61 illustrates the many level of distances to create two-pointdiscrimination on the human male body locations in which these distancesare performed in order for effective two-point discriminationcommunication; and

FIGS. 62-63 illustrate close up side views of an elongated back shaverhandle and a safety razor removably attaching to the elongated handlewith a pivot mechanism according to embodiments of the presentinventions

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

FIG. 1 is a schematic cross-sectional view of a razor blade shavinggeometry illustrating a skin surface contour A, an outer comb 140, anouter teeth tip 150, an outer teeth inside edge 190, an inner guard 130,an inner guard edge 180, a base 200, a deep void 160, a cutting blade110 and a sharp edge 120 of cutting blade 110 wherein sharp edge 120engages alongside skin surface contour A in a first position; andalongside inverted skin surface contour C in a second position while theopposite side view of this embodiment being identical according to afirst embodiment of the present inventions. As illustrated in FIG. 1 asafety razor 100 with an outer comb 140 and cutting blade 110 and ashaving geometry coinciding with present inventions. A cutting blade110; a sharp edge 120 at the end of a cutting blade 110; an inner guard130; an outer comb 140; an outer teeth tip 150; a deep void 160; aninner guard edge 180; an inside edge 190 of outer teeth tips 150; a base200; an elongated side 210; and a cutting blade end 220 whereby in oneembodiment illustrated in FIG. 1 the members engaging in a firstposition or in other words making initial contact with skin surfacecontour A includes the inside edge 190 of the outer teeth tip 150, thesharp edge 120, and the inner guard edge 180 wherein a skin surfacecontour A is defined by the inside edge 190 of outer teeth tips 150 andthe inner guard edge 180 of the inner guard 130. In the first embodimentthe sharp edge 120 of the cutting blade 110 does not protrude the skinplanar surface A. As will be seem in each of the first through thefourth embodiments, the sharp edge 120 of the cutting blade 110 does notprotrude the skin planar surface A. A cutting blade 110 made ofstainless steel extends along a path intermediate of a deep void 160 andinner guard 130. It should be known the preferred cutting blade 110exposure is less than about 0.030 inches (about 0.0762 centimeter). Astrong opposing force of at least 10 pounds (4.536 kilograms (10pounds)) may be applied while protecting and minimizing cutting ornicking on a skin surface when the apparatus engages.

A sharp edge 120 opposite of cutting blade end 220 is dependent onshaving blade geometry in order to produce greater or lesser friction.One characteristic in creating a lesser friction between sharp edge 120of cutting blade 110 and a skin surface contour A is presented in thisinvention wherein a sharp edge 120 of a cutting blade 110 is prohibitedfrom protruding said skin surface contour A. In the efforts to promoteless friction, the level of distance between the base 200 and the sharpedge 120 of the cutting blade 110 will be substantial. Flexibility ofcutting blade 110 is dependent upon the distance exhibited between abase 200 and sharp edge 120 wherein the greater the margin of distancethe more flexibility is exhibited which results in less friction betweensharp edge 120 and skin surface when opposing force is applied. Anextremely decreased level of friction by an extremely flexible cuttingblade 110 wherein said sharp edge 120 of cutting blade 110 does notprotrude flat plane of a skin surface contour A and allows for a shavewhere lubricant is not a recommended application. The less the level ofdistance between base 200 and sharp edge 120 the more rigid and lessflexible the cutting blade 110. Thus, a more rigid cutting blade 110would be the result of an increased level of friction between sharp edge120 of a cutting blade 110 and a skin surface.

An inner guard 130 is a supporting member mounted adjacent of saidcutting blade 110 where, within said shaving geometry, inner guard 130embodies an inner guard edge 180 which with an inside edge 190 of outerteeth tips 150 together create skin surface contour A. Inner guard edge180 may have teeth wherein teeth possess a web covering in order to hideshorn hairs as will later be further disused and illustrated in FIG. 17.Overall preferred distance from inner guard edge 180 to outer teethinside edge 190 of outer teeth tips 150 is about 0.068 inches (about0.1727 centimeter).

An outer comb 140 having elongated side 210 a row of outer teeth tips150 and allowing shorn hair to exit the safety razor rearward of outerteeth inside edge 190 as illustrated in FIG. 19. Outer teeth tips 150,in a preferred embodiment as illustrated in FIG. 1-7 are no more than0.032 inches (0.08128 centimeter) outside of sharp edge 120 of cuttingblade 110. The outer comb 140 is preferably made from injected moldedplastic or flexible plastic material used in many of the prior artshaving assemblies and typically well acceptable by customers seekingshaving products as they are durable and productive. The outer comb 140may also be manufactured of stainless steel or chrome in order to caterto an audience seeking a higher quality product which is common in thewet shaving industry market. An inside portion of the outer comb 140removed in order to create a deep void 160.

A deep void 160 is spaced intermediately of outer teeth tips 150 andcutting blade 110. Deep void 160 in a preferred embodiment having apreferred thickness “K” of 0.014 inches (0.03556 centimeter) or less inorder to control over-exposure and over flexibility of said cuttingblade 110. The thickness K as described is can be measured between innerside of comb and inner side of the cutting blade 110. The deep void 160level of thickness limits the level of flexibility of the cutting blade110 and plays an important role in the preferred level of frictiondisplayed between the sharp edge 120 of a cutting blade 110 and a theskin surface contours in FIGS. 1-4. Although said deep void 160 may runthicker than 0.014 inches (0.03556 centimeter) a dangerous level offriction is presented wherein greater exposure of sharp edge 120 ofcutting blade 110 is presented. Deep void 160 also maintains a lengthwhich is referenced as “L” in FIGS. 1-7. However, the length of L playsa vital role in FIG. 1-4 in that the L represents the distance from base200 to sharp edge 120 of cutting blade 110. It is important to rememberthat in seeking to prevent a dangerous level of sharp edge 120 exposurethe opening between the sharp edge 120 of the cutting blade 110 and aninside edge 190 of the outer teeth tips 150 of the outer comb 140 has adimension less than or equal to a dimension of an opening between thesharp edge 120 of the cutting blade 110 and an inner guard edge 180 ofthe inner guard 130. Dimension of said deep void 160 is chosen tocontrol the level of flexibility of a cutting blade 110 in order toshave hairs effectively while maintaining a level of friction thatreduces the risk of cutting or bleeding. When beginning the shavingprocess an individual embracing the safety razor 100 makes initialcontact to their skin surface on the skin surface contour A which isreferred to as “first position”. The distance from the inside edge 190of the outer teeth tips 150 to the inner guard edge 180 define the skinsurface contour A or the first position. In certain embodiments asillustrated by FIG. 1 and FIG. 6 the sharp edge 120 of cutting blade 110is also engaged in first position along a skin surface contour A. Whensaid sharp edge 120 of cutting blade 110 is engaging in a first positionsaid sharp edge 120 will not protrude the skin surface contour A. As canbe seen and will be further described cutting blade 110 in FIG. 3engages in the second position.

The skin surface contour A is flat when not pressed by the safety razor100. When the safety razor 100 is pressed against the skin surfacecontour A during shaving, the skin surface contours B or C result asillustrated in FIG. 1, depending on how hard it is pressed. The outercomb 140 and the inner guard 130 press against the skin surface creatingtwo impressions and a convex skin surface contour B or C therebetween.This convex surface of the skin raises the skin closer to the sharp edge120 for a closer cut of the hair. In some instances the convex skinsurface may be considered protuberant.

The skin surface contours B or C have a convex skin surface contourbetween a pair of skin indents respectively created between both theouter comb 140 and the inner guard 130. When both the inside edge 190 ofthe outer comb 140 and the inner guard edge 180 of the inner guard 130press into the skin, the recessed sharp edge 120 moves relatively closertowards the skin surface contour B or C of the skin when cutting thehair.

The outer comb 140 and the inner guard 130 simultaneously touch the skinsurface during shaving and can also firmly press respective indents intothe skin surface during shaving. Thus the convex contour between a pairof skin indents is respectively created between both the outer comb 140and the inner guard 130 pressing into the skin surface. Because thepresent inventions are suitable for dry shaving, without a shaving creamor surface lubricant, the inner guard 130 can firmly press against theskin surface and there is no concern about shaving cream or skinlubricant removal by scraping from the skin surface before the skinsurface and hair hit the sharp edge 120 of the cutting blade 110.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “L” references the deep void 160 running lengthwise from the        outer teeth tips 150 to the base 200 which allows ample space        for the flexibility of said cutting blade 110 to perform    -   “K’ references the thickness of the said deep void 160 between        the outer comb 140 and the cutting blade 110 which is a        contributing factor in the level of flexibility the cutting        blade 110 illustrates when shaving;    -   “A” references the skin surface contour A which is formed        between the inside edge 190 of the outer teeth tips 150 and the        inner guard edge 180. Skin surface contour A is also referenced        as being the “first position” when safety razor 100 initially        engages a skin surface contour A;    -   “B” references a convex skin surface contour A engaged in a        convex surface contour in a second position as indicated in FIG.        3 wherein the sharp edge 120 of cutting blade 110 is engaged        initially at a second position inside the original first        position or skin surface contour A;    -   “C” references a convex skin surface contour A engaged in a        convex contour whereby in FIG. 1 and FIG. 2 convex skin surface        contour C is formed by cutting blade 110 flexed against an        opposing skin surface force in a second position is inside the        original first position and in FIG. 3 and FIG. 4 convex skin        surface contour C is formed in a third position inside of the        original first position A and the second position B when        opposing force is applied during the shaving operation;    -   “D” references the margin difference between when sharp edge 120        of cutting blade 110 is flexed against opposing force versus its        original position or “uninterrupted” position. In FIG. 1 and        FIG. 2 reference D is the margin of difference between skin        surface contours A versus C. In FIG. 3 we see reference D is the        difference between convex skin surface contour B and skin        surface contour C.    -   “E” referencing the distance of skin surface contour A or the        distance between the inside edge 190 of outer teeth tips 150 and        the inner guard edge 180. Reference J is always greater than or        equal to G. Although a number alternative distances may exist to        create an effective shaving assembly a preferred embodiment the        margin of distance is about 0.068″;    -   “J” references the margin of distance between the sharp edge 120        of a cutting blade 110 and the inner guard edge 180. Although a        number alternative distances may exist to create an effective        shaving assembly a preferred embodiment the margin of distance        is about 0.024″;    -   “G” references the margin of distance between the sharp edge 120        of a cutting blade 110 and the inside edge 190 of the outer        teeth tips 150. Although a number alternative distances may        exist to create an effective shaving assembly a preferred        embodiment the margin of distance is about 0.018″; and    -   “H” references to the midpoint section of a cutting blade 110.

The safety razor 100 removes hair from skin using the cutting blade 110comprising a sharp edge 120 along an elongated side 210 of a planarsurface. An outer comb 140 has a row of outer teeth 140 running alongthe planar surface on an outside of the cutting blade 110, each of theouter teeth of the outer comb 140 is substantially perpendicular to thesharp edge 120 and spaced with a deep void 160 between the row of theouter comb 140 and the planar surface of the cutting blade 110, whereinends of the outer comb 140 comprise outer teeth tips 150. An inner guard130 runs along the planar surface on an inside of the cutting blade 110.The sharp edge 120 of cutting blade 110 is recessed up to a skin surfacecontour A. The skin surface contour defined from the inside edges 190 ofouter teeth tips 150 to the inner guard edge 180. When cutting blade 110is flexing said cutting blade 110 longitudinally bends in a curved-likearc while sharp edge 120 of cutting blade 110 causing further recess Drelative to the skin surface contour A. The sharp edge of the cuttingblade can longitudinally bend to cause further recess relative to theskin surface contour. The sharp edge of the cutting blade canlongitudinally bend to cause further recess relative to the skin surfacecontour. The cutting blade 110 is fixedly anchored on the cutting bladeend 220 opposite the sharp edge 120.

The inner guard 130 may comprise an inner comb comprising a row of innerteeth running along the elongated side of an inside of the cutting blade110, each of the inner teeth substantially perpendicular to the sharpedge 120.

A user for hair removal moves the safety razor 100 across skin such thatthe outer comb 140 extends over the cutting blade 110 to contact thehair before the hair comes in contact with the sharp edge 120. Prior tothe shaving operation or flexing of the cutting blade 110 the innerguard 130 can have substantially no void between the cutting blade 110and inner guard 130. When the safety razor 100 moves across the skin,the hair first passes through the outer comb 140 and then second thesharp edge 120 of the cutting blade 110 bends in a direction towards theouter comb 140 against a skin surface contour shortening the width ofthe gap G between the sharp edge 120 of the cutting blade 110 and therow of outer teeth of the outer comb 140 in FIGS. 1-4 and the hair iscut by the sharp edge 120. The base 200 is positioned to create a levelof distance between said base 200 and sharp edge 120 of cutting blade110 in order to enable a controlled level of flexibility with saidcutting blade 110. Outer comb 140 acts as a barrier to physically limitover bending of the sharp edge 120 of the cutting blade 110.

The safety razor 100 is moved across skin such that an outer comb 140extends over the cutting blade 110 to contact hair before the hair comesin contact with a sharp edge 120. When moving the safety razor 100across skin, the hair first passes through the outer teeth of the outercomb 140 and second then the sharp edge 120 of the cutting blade 110bends in a direction to shorten the width of the gap G between the sharpedge 120 of the cutting blade 110 and the row of outer teeth of theouter comb 140 and the hair is cut by the sharp edge 120.

A deep void 160 exists between the planar surface of the cutting blade110 and the outer comb 140 in the first and second and third and fourthembodiments of respective FIGS. 1-5. The deep void 160 extending fromthe outer teeth tips 150 to a base 200 of the outer comb 140. In orderto create a desired “light friction” shave a preferred length of thedeep void 160 reaching from outer teeth tips 150 to the base 200 is0.180 inches (0.4572 centimeter). The closer a base 200 in distance tothe sharp edge 120 of a cutting blade 110 the more rigid and lessflexible the cutting blade 110 becomes and thus the level of frictionincreases between sharp edge 120 of a cutting blade 110 and a skinsurface contour. Just the opposite, the further in distance a base 200is to the sharp edge 120 of a cutting blade 110 the less rigid or moreflexible the cutting blade 110 becomes and thus the level of frictiondecreases between a sharp edge 120 of a cutting blade 110 and a skinsurface contour. It is important to note that aside from the position ofsaid base 200, the degree of thickness of the deep void 160 which isrepresented as K plays a factor in determining the level of flexibilityby which said cutting blade 110 is granted.

An opening G between the sharp edge 120 of cutting blade 110 and insideedges 190 of the outer teeth tips 150 of the outer comb 140 has adimension G the same or less than a dimension J of an opening J betweenthe sharp edge 120 of cutting blade 110 and an inner guard edge 180 ofthe inner guard 130. A dimension of the deep void 160 has a depthextending from the outer teeth tips 150 to a base 200 of the outer comb140 substantially greater than a dimension G of the gap G. A dimensionof the gap G is chosen in connection with the preferred distance of abase 200 from the sharp edge 120 of a cutting blade 110. It should benoted that the closer the base 200 is in distance to the sharp edge 120of a cutting blade 110 the smaller the gap G becomes. The further awaythe base 200 is in distance to the sharp edge 120 of the cutting blade110, the larger the gap G may become.

A problem with prior safety razors is that while they do offer a levelof protection when contouring within the shaving process, it is widelyknown that in order to attain such a close shave that they still dorequire and create a cutting blade flexibility and exposure that is fartoo rigid to create a controlled atmosphere that would allow one to dryshave a hard-to-reach area such as one's back without application ofshaving cream. More often in order to create a safety razor thatnavigates angles and bumps we see the safety razor 100 housing or“cartridge” being altered while the cutting blade 110 remains rigid. Thestrong friction is often illustrated in today's market between the sharpedge 120 of the cutting blade 110 and a skin surface which is why theapplication of shaving cream or shaving gel prior to shaving isrecommended in order to minimize the cutting or nicking of the skinsurface. The prior safety razors do not allow a controlled shavinggeometry that minimizes cutting blade 110 exposure while offering alevel of flexibility take place without the use of shaving cream or gelin order to greatly minimize cutting or bleeding. One common factoramongst the majority of safety razors is that the cutting blade,although engaging by guards that may assist in deflection when engaginga skin surface, often embody a cutting blade that is capable ofprotruding a skin surface contour A that is formed between an innerguard edge 180 and the inside edge 190 of the outer teeth tips 150.Another important missing characteristic of the prior art is that theredoes not exist an opening G between the sharp edge 120 of cutting blade110 and an inside edge 190 that remains the same level of distance orless than an opening represented by J which exists between the sharpedge 120 of cutting blade 110 and an inner guard edge 180 of the innerguard 130. A final important notation is that a cutting blade 110 thatis most commonly found within razors today do not embody a preferredlevel of distance between a sharp edge 120 and a base 200 that wouldallow for a proper amount of cutting blade 110 flexibility which createsan extremely light or soft level of friction between sharp edge 120 of acutting blade 110 and a skin surface.

Furthermore, in embodiments of the present inventions there is a deepvoid 160 that is specified in FIG. 1 wherein said deep void 160 isembodied between the base 200 and outer teeth tips 150 and enablesmultiple contributing factors one of which would be the thickness of thedeep void 160 represented by K which the level of thickness controls thelevel flexibility of cutting blade 110. This ultimately controls thelevel of friction allowed between sharp edge 120 of cutting blade 110and a skin surface contour which in FIG. 1 is represented as A in thefirst position. These are important factors of the present inventionssince creating a light traction is necessary when dry shaving andcutting at a lesser depth than a traditional over exposed and over rigidsafety razor cutting blade 110. In summary, this prior art is generallydesigned to perform or cut hair at an aggressive level while creating ahousing surrounding a cutting blade 110 or blades that create or allow alevel of safety during the shaving operation. My invention, however,does not attempt to perform or cut hair at an aggressive level butinstead performs or cuts at a less aggressive level. Furthermore, myinvention takes advantage of the flexibility of a skin surface. Thehuman skin is flexible and is able to bend at many contour angles. Beingthat in my invention a skin surface is granted ability to bend in aconvex contour between a pair of skin indents respectively createdbetween the comb and guard with an aggressively flexible cutting bladewe notice a preferred level of friction throughout the shavingoperation. Most prior art embodiments we see the guards or housingcartridges bending or flexing around the cutting blade wherein myinvention I illustrate the cutting blade bending and flexing in relationto skin surface contour created by the fixed housing. The priority in myinvention is that it cuts at a less aggressive level wherein anindividual is not required to apply shaving cream or shaving lubricantto their back or back side prior to shaving in order to prevent severalrazor burn or cutting. It is very difficult for an individual to accesstheir own back or back side with shaving cream without asking forassistance from another individual or without using a handle that mayextend in length to access their back or back side. Thus, is provesbeneficial to have a safety razor designed to allow an effective shavethat does not rely on shaving cream or a shaving lubricant to be appliedto dry skin prior to the shaving operation in order to protect oneselffrom cutting or bleeding. In addition, the cost associated withpurchasing shaving cream is saved since shaving cream is not arequirement. Also, it is very scary for an individual to access theirback or back side with a safety razor that does not cut at a levelaggressive level of shaving friction. Not being able to accurately viewyour own back or back side while attempting to use a sharp safety razoris very dangerous and scary. The less aggressive level of shavingoperation in my invention offers a level of protection and lightfriction that does not require shaving cream or a shaving lubricant tobe applied to dry skin prior to the shaving operation in order toprotect a skin surface from cutting or bleeding from the cutting blade.It is widely known that cutting or bleeding is a common side effect whenshaving one's face with a safety razor design for one's face. Also, anarea such as one's back or back side offers a surface where the largerarea of skin offers more flexibility of a skin surface area which provesbeneficial to my invention. The majority allows a redundant amount ofrigid cutting blade exposure when attempting to dry shave without theuse of shaving cream which can lead to severe cutting or what iscommonly referred to as “razor burn” to take place which is described asa skin condition featuring a red rash, bumps, or even infected blisters.

FIG. 2 is a schematic cross-sectional view of a razor blade shavinggeometry wherein a cutting blade 110 engages an opposing force of aconvex skin surface contour C in a second position according to thefirst embodiment of the present inventions. FIG. 2 illustrates a skinsurface contour A or C, a comb, an outer teeth tip 150, outer teethinside edge 190, an inner guard 130, an inner guard edge 180, a base 200and a cutting blade 110 wherein the cutting blade 110 engages a convexskin surface in a second position; the opposite side view of thisembodiment being identical according to a second embodiment of thepresent inventions. As illustrated in FIG. 2, while a first position isstill active, a “second position” is created when an individualexercises a shaving stroke wherein an opposing force is applied allowinga determined degree of friction between sharp edge 120 of cutting blade110 and skin surface whereby the degree of friction is determined by thesharp edge 120 of a cutting blade 110 being recessed up to a skinsurface as well determined by the degree of distance a base 200 ispositioned from the sharp edge 120 of a cutting blade 110. The furtherthe distance a base 200 is positioned away from a sharp edge 120 of acutting blade 110 the more flexibility is allowed by a cutting blade 110which creates a lower level of friction and a softer shave. The closerthe distance a base 200 is positioned from a sharp edge 120 of a cuttingblade 110 the cutting blade 110 is more rigid and less flexible whichcreates a higher level of friction and a stronger shave. Althoughvarious measurements will create a light friction between the sharp edge120 and a skin surface, the preferred length of the deep void 160 increating a light friction is 0.180 inches (0.4572 centimeter) from thebase 200 to the outer teeth tips 150. Furthermore, the thickness of thedeep void 160 participates in controlling the level of friction betweenthe sharp edge 120 of a cutting blade 110 and a skin surface as itlimits the flexibility level of a cutting blade 110. Said sharp edge 120of cutting blade 110 may engage in a first and second position butalways along with at least one outer teeth inside edge 190 and at leastone inner guard edge 180 on each opposite side of cutting blade 110. Anouter teeth inside edge 190 running along the elongated side 210 of anoutside of said cutting blade 110 and inner guard edge 180 running alongthe elongated side 210 of an inside of said cutting blade 110 Asillustrated in FIG. 2 a safety razor 100 with comb and integrated bladein accordance with FIG. 1 wherein the cutting blade 110 is engaged in asecond position with an opposing force wherein sharp edge 120 is flexedagainst a convex skin surface contour C. FIG. 2 illustrates a gentlefriction between cutting blade 110 and skin surface contour which allowsfor an effective shave while cutting the hair a beneficial level versusthe majority of straight edge razors assemblies on the market which aimto cut the hair as close as possible or even beneath the skin surfacewhich is the reason shaving cream or shaving gel is often sold withstraight razors. Skin surface contour A, in a preferred embodiment, ispositioned between 20 to 50 degrees. Due to the fact that my inventioncuts a hair at a less aggressive length the presence of shaving cream orgel prior to shaving is not necessary to minimize cutting or nicking ofthe skin surface. Furthermore, embodiments of the present inventionswork better in areas of the body that have hair follicles less coarse.For example embodiments of the present inventions work better one backor arm hair which often possesses hair less coarse or thick incomparison to facial hair which is known to be thicker in nature.

FIG. 3 is a schematic cross-sectional view of razor blade shavinggeometry illustrating whereby the base 200 is positioned closer indistance to the sharp edge 120 in comparison to the first embodiment inFIG. 1 and FIG. 2. When creating a less flexible cutting blade 110 incomparison to the first embodiment, it is necessary, in the spirit ofmaintaining a lighter friction between skin surface contour A and sharpedge 120, for said cutting blade 110 to be positioned inside of a skinsurface contour A creating less cutting blade 110 blade exposure whichin turn creates a lighter friction. As illustrated in FIG. 3 is a safetyrazor 100 with comb and integrated blade in accordance with FIG. 1wherein the cutting blade 110 is positioned at convex skin surfacecontour B in a second position inside a skin surface contour A. Thecutting blade 110 is fixedly anchored at a cutting blade end 220. ThisFIG. 3 demonstrates how when a cutting blade 110 maintains a base 200closer in margin distance to the sharp edge 120 it is necessary todecrease the exposure of a cutting blade 110 is relation to the skinsurface in order to maintain a less aggressive shaving friction.

FIG. 4 is a schematic cross-sectional view of a razor blade shavinggeometry whereby the base 200 is positioned in a closer distance incomparison to FIG. 1 and FIG. 2 and said cutting blade 110 is engages inthe second position an opposing force at a convex skin surface contour Caccording to the second embodiment of the present inventions. Theinverted skin surface contour C is a sharper arc shaped bend than theinverted skin surface contour B or the flat plane of the skin surfacecontour A. As illustrated in FIG. 4 is a safety razor 100 in accordancewith FIG. 3 wherein the cutting blade 110 is engaged in a third positionwith an opposing force and sharp edge 120 is flexed against a convexskin surface contour C. The cutting blade 110 is fixedly anchored at acutting blade end 230. When said cutting blade 110 is engaged in a thirdposition with an opposing force the void margin indicated by K isminimized between the cutting blade 110 and the outer comb 140. FIG. 4clearly illustrates since the distance margin between the base 200 andthe sharp edge 120 is increased when compared to FIG. 1 and FIG. 2 theexposure of the cutting blade 110 is decreased. This adjustment allows alight friction to be maintained in order to create an effective shavethat ultimately does not require shaving cream or lubricant in order toprevent severe cutting or nicking of a skin surface.

FIG. 5 is a schematic cross-sectional view of a razor blade shavinggeometry whereby the cutting blade 110 is fastened in a fixed positioninside of the skin surface contour A according to a third embodiment ofthe present inventions. A fixedly anchored cutting blade 110 of a rigidmaterial is substantially recessed inside the skin surface contour A ofFIG. 5. As illustrated in FIG. 5 is a safety razor 100 wherein a cuttingblade 110 is made from a non-flexible razor or perhaps ceramic. Thecutting blade 110 is fixedly anchored between cutting blade end 240 anda base 200 wherein the sharp edge 120 remaining inside of a skin surfacecontour A at the same position in both the first position A and secondposition B for the purpose of allowing cutting accessibility whileprotecting the skin surface due to non-flexing attributes of cuttingblade 110. Being that the cutting blade 110 in this example is made froma non-flexible razor such as ceramic the position of the base 200 to thesharp edge 120 of the cutting blade 110 is not relevant in this example.

FIG. 6 is a schematic cross-sectional view of a razor blade shavinggeometry whereby said sharp edge 120 of a cutting blade 110 is at theskin surface contour A in a first position and a flexible spring 170 isembodied in order to prepare for the cutting blade 110 to engage anopposing force of a skin surface contour in a second position accordingto a fourth embodiment of the present inventions. As illustrated in FIG.6 is a safety razor 100 wherein a cutting blade 110 is in an engagingfirst position alongside a skin surface contour A and not protruding theskin surface contour A. Illustrated in FIG. 6 is a flexible spring 170which is implemented in order to cutting blade 110 flexibility in adifferent manner when compared to FIG. 2 and FIG. 4. The cutting blade110 is fixedly anchored at a flexible spring 170. The flexible spring170, of the fourth embodiment of FIG. 6, is operatively coupled to thecutting blade 110 on a cutting blade end 250 of the planar surfaceopposite the sharp edge 120, causes further recess relative to the skinsurface contour A. Being that the cutting blade 110 in this example isallowed flexibility in a different manner when compared to FIG. 2 andFIG. 4 the position of the base 200 is not relevant in terms ofdetermining a level of friction between sharp edge 120 of the cuttingblade 110 and a skin surface.

FIG. 7 is a schematic cross-sectional view of a razor blade shavinggeometry whereby said cutting blade 110 is flexed and engaged in asecond position C inside of the skin surface contour A by a springaccording to the fourth embodiment of the present inventions. Asillustrated in FIG. 7 and in accordance with FIG. 6 the cutting blade110 is flexing due to a flexible spring 170 allowing the cutting blade110 to retract horizontally and away from skin surface contour A. Theflexible spring 170, of the fourth embodiment of FIG. 7, is operativelycoupled to the cutting blade 110 on a cutting blade end 250 of theplanar surface opposite the sharp edge 120, causes further recessrelative to the skin surface contour A. The cutting blade 110 is fixedlyanchored at a flexible spring 170. Due to the manner in which thecutting blade 110 is flexing in FIG. 7 the need for a deep void 160 isirrelevant as the cutting blade 110 is not flexing or bending towardsthe outer comb 140. It can be seen in FIG. 7 that the margin indicatedby L is greatly reduced when engaging in a second position with anopposing force. Being that the cutting blade 110 in this example isallowed flexibility in a different manner when compared to FIG. 2 andFIG. 4 the position of the base 200 is not relevant in terms ofdetermining a level of friction between sharp edge 120 of the cuttingblade 110 and a skin surface contour. Furthermore, as illustrated inFIG. 1-6 a margin or gap represented by G in FIG. 7 is the equal to orless than the margin represented by J.

A FIG. 8 is an angled elevated view of the razor blade whereby the combportion is end up. As illustrated in FIG. 8 the safety razor 100 is inan upright position.

FIG. 9 is an elevated cut-away view of the apparatus as seen in FIG. 8illustrating the comb, cutting blade and inner guard assembly.

FIG. 10 is an eye-level view of the apparatus of the present inventionsillustrating the comb, cutting blade and inner guard with like referencenumerals according to any of the first through fourth embodiments ofFIG. 1-7.

FIG. 11 is an elevated angled view of the present inventions whereby theinner guard 130 is end up and apparatus is up-side down with likereference numerals according to any of the first through fourthembodiments of FIGS. 1-7. As illustrated in FIG. 11 the safety razor 100is in an upside-down position wherein the inner guard 130 is upright.

FIG. 12 is an elevated angled up-side down view of the presentinventions that illustrates a plurality of safety razors 100 assembledtogether as one apparatus with like reference numerals according to anyof the first through seventh embodiments. As illustrated in FIG. 12 areredundant safety razors 100 creating a dual-blade structure.

FIG. 13 is a side view the elongated handle 260 by which the safetyrazor 100 attaches on the upper end 290 to in order to reach and shaveareas of the body. As illustrated in FIG. 13 a safety razor 100 mayattach to an elongated handle 260 which has an upper end 290 as well asa lower end 300 and a receiving end 320. Using the elongated handle 260with attached safety razor 100 allows for access to desired shavingareas that may be hard-to-reach or prove difficult access.

FIG. 14 is a side close up view of the upper end 290 of the handlewhereby the safety razor 100 attaches. As seen from FIG. 14 upper end290 or a portion thereof of receiving end 320 may be made from amaterial such as rubber or another flexible material that would allowthe cutting blade 110 to pivot which would prove beneficial during theshaving process. A handle at the upper end 290 comprises a flexiblecoupling 350 coupled to the safety razor 100. Furthermore, a flexiblecoupling 350 proves beneficial when a user to have flexibility in theirshaving stroke in order to navigate bumps or contour angles that canotherwise prove difficult.

FIG. 15 is an elevated angled view illustrated a palm-fitted handle 270shaped to confirm to the shape of an individuals' hand or palm. Asillustrated in FIG. 15 is a palm-fitted handle 270 used to accommodatedesired shaving areas that would benefit from the safety razor 100 butwould not necessarily require an elongated handle 260 in order to accessthe desired shaving area. One example of this embodiment would be forindividuals who wish to shave hair on their arms or legs in order tobetter display their tattoos. Because a safety razor 100 that is widerwould prove more beneficial to shaving quickly a palm-fitted handle 270would be much more accommodating versus a traditional shaving handlefound in most markets.

FIG. 16 is an elevated angled view of the present inventions whereby thesafety razor 100 is attached to handle 280 most commonly used in withtraditional shaving razor blades that are used to shave one's face. Asillustrated in FIG. 16 is a safety razor 100 is attached to atraditional shaving handle 280 to allow access to areas whereby suchhandle 280 may prove useful such as one's neckline. The presentinvention illustrated in FIG. 1 creates such a soft friction betweensharp edge 120 of cutting blade 110 and a skin surface which would notbe the most desirable for accomplishing a clean close shave on one'sface. FIG. 1 is most beneficial for areas of the body wherein hair mayexist to be less dense in population as it strives to reduce the levelat which hair is cut while still disallowing stubble. However, thecloser the base 200 is positioned to the sharp edge 120 the more rigidthe cutting blade 110 becomes and the easier the shaving operationbecomes when attempting to shave areas consisting of more densepopulation of hair such as one's face.

FIG. 17 is and front elevated view of the razor blade illustrating theweb covering 340 existing between each tooth in order to conceal shornhair from view. The illustration of FIG. 17 can apply to any of thefirst through fourth embodiments of FIGS. 1-7. As previously mentionedand illustrated in FIG. 17 the inner guard 130 in a separate embodimentmay embody a comb or teeth near the side wherein the inner guard edge180 is positioned. That being said, the web covering 340 embodiedin-between each tooth can be implemented between the teeth embodiedwithin the elongated side H of the inner guard 130 as well as theelongated side of the outer comb 140. The web covering 340 acts muchlike an umbrella overhang covering between each tooth in order toconceal any shorn hairs from the public viewing. Being that the currentinvention embodies a deep void 160 there poses a risk of shorn hairsgetting clogged over time. Though most shorn hairs will past through thesafety razor 100 there is a small percentage that may still get stuck orclogged within the deep void 160. Too often users of safety razorsdispose far too quickly disposable razors that are estheticallyunappealing due to a build-up of shorn hairs. The web covering 340 actsto conceal any unappealing shorn hairs that cannot get brushed out orunclogged.

FIG. 18 is a view of an individual utilizing the safety razor 100 bymethod of an elongated handle 260. As illustrated in FIG. 18 is anindividual gripping the lower end 300 of the elongated handle 260 andutilizing the elongated handle 260 attached to a safety razor 100 andshaving the back side which often proves difficult in gainingappropriate access. Although the illustration of FIG. 18 illustrates thefirst embodiment of FIGS. 1-2, FIG. 18 can apply to any of the firstthrough fourth embodiments of FIGS. 1-7.

FIG. 19 is a close up view of the safety razor 100 cutting hair alongthe back side of an individual. As illustrated in FIG. 19 is a close-upview of the safety razor 100 illustration of FIG. 18. Illustrated is thesafety razor 100 shaving hair and cutting blade 110 flexing in a secondposition C according to the cutting action illustrated by FIG. 2 for thefirst embodiment. Furthermore, shorn hairs may pass through the outerteeth tips 150 and exit the safety razor 100 versus getting clogged orcaught in the deep void 160. Though some hairs may get clogged or caughtthe web covering 340 covers visible exposure.

As previously indicated, FIG. 19 is a close-up view of the safety razor100 as seen in FIG. 18 and illustrates the first embodiment illustratedin FIGS. 1-2. The skin surface contour has a convex skin surface contourbetween a pair of skin indents respectively created between both theouter comb 140 and the inner guard 130. When both the inside edge 190 ofthe outer comb 140 and the inner guard edge 180 of the inner guard 130press into the skin, the recessed sharp edge 120 moves relatively closertowards the skin surface contour of the skin when cutting the hair.

The cutting blade 110 is at an angle nearly parallel to both the outercomb 140 and the inner guard 130 in embodiments. The cutting blade 110of embodiments longitudinally bends in a direction of uncut hairs whenthe safety razor 100 is moved across the skin surface. The sharp edge ofthe cutting blade can longitudinally bend to cause further recessrelative to the skin surface contour. The sharp edge of the cuttingblade can longitudinally bend to cause further recess relative to theskin surface contour. This bend is in a direction less perpendicular tothe skin surface. In embodiments of the present inventions, the cuttingblade 110 in the safety razor 100 performs less rigidly against the skinsurface and hair than in most prior razors. The deeper the void, themore the blade is cantilevered and the less rigid is its flexibility.Alternately, with a springier cutting blade 110 material or an innerspring, the blade has more flexibility. Such contributes to enhancedperformance on dry conditions knowing that the closest save is not ahighest priority on certain skin such as self-shaving the skin surfaceof ones back with a long handle 280 and no mirror.

A user of the safety razor 100 of embodiments can adjust how far thesharp edge 120 digs into the user's skin by varying the pressure of thesafety razor 100 thereby adjusting how far the cutting blade 110longitudinally bends. This may in some embodiments adjust the relativeblade recess depth from the skin. These embodiments can be one mechanismfor a user who feels adverse cutting feedback to adjust the blade recessby altering the pressure during the movement stroke. In otherembodiments the cutting blade may be configured so altering speed orintensity of the movement stroke adjusts the blade recess.

FIG. 20 illustrates a side view of a safety razor 100 with an elongatedhandle 260 which embodies an upper end 290 and a lower end 300. Asillustrated in FIG. 20 an elongated handle 260 can accept a shaving soapsponge 330 at a receiving end 320 near an upper end 290 opposite a lowerend 300 and can easily be attached and removed in the same way thesafety razor 100 can be easily attached and removed if an individualshould decide to use the safety razor 100 in the shower which iscommonly referred to as “wet shaving”.

The term “flexible”, as described previously in the first and secondembodiment, is intended to describe the amount of bending or curvedmargin D the cutting blade 110 is granted in response to normal humanopposing shaving forces. The “flexibility” of the cutting blade 110 inthe first embodiment of FIGS. 1 and 2 is greater than the flexibilityexhibited in the second embodiment or FIGS. 3 and 4. The term “flexible”takes on a different interpretation in the fourth embodiment wherein theflexible spring 170 is “flexed” allowing the cutting blade 110 toretract or flex horizontally and away from skin surface contour A.

A low friction between sharp edge 120 and a skin surface is illustratedin the first through the fourth embodiments illustrated in FIGS. 1-7 ofthe present inventions wherein a cutting blade 110 capable of lesscoarse hair found on an individual's back or arms at a depth allowing asmooth surface and all while minimizing cutting, razor burn as well asminimizing pulling or tugging hair while absent of an application ofshaving cream or a shaving gel. Though a stronger friction may beallowed through the methods previously described, the preferred light orlow friction is best practice when shaving one's back, buttock, arms orother areas that contain less dense areas of hair or areas that may bevery sensitive to close shaving.

It is important to note in embodiments of the present inventionspreferred cutting axis is a cutting axis between 20-50 degrees. An axisoutside of 20-50 degrees, though may be accomplished, proves difficultwhen accessing petite skin surface areas whereby the risk of cutting orrazor burn is greatly increased.

In further contrast to prior art the current invention does not requirethe razor blades to be exposed to water or shaving cream in order tooffer a clean and close shave or to protect from cutting, nicking orskin irritation. This is a very important factor of the presentinventions since application of shaving cream or lubricant can beextremely time consuming especially when applying to one's back side.Thus, not requiring the shaving cream lubricant is very time efficient.Furthermore, because the cutting blade 110 may be made from stainlesssteel the invention allows the safety razor 100 to last longer withoutany rusting since water and shaving cream, which will cause erosion orrust, is not necessary.

The preferred distance of separation between the inner guard edge 180and the sharp edge 120 is a preferable margin of about 0.030 inches(about 0.0762 centimeter). The preferred distance of separation betweenthe sharp edge 120 and the outer comb 140 inside edge 190 is about 0.032inches (about 0.08128 centimeter). The preferred thickness of innerguard 130 is about 0.024 inches (about 0.06096 centimeter) or less. Thepreferred thickness of outer teeth tips 150 is about 0.026 inches (about0.06604 centimeter) or less. The preferred cutting blade 110 exposure isabout 0.030 inches (about 0.0762 centimeter) or less. Although theshaving geometry can be accomplished outside of these measurements theseare preferred.

The present inventions relate to a safety razors themselves or safetyrazors with elongated handles of the type that allow a user to, withforce applied, creates, in some embodiments forces along the handle withthe skin and, in other embodiments, creates indentations into the skinand more particularly, in some further embodiments, may relate to asafety razor and elongated handle granting a user a source ofcommunication known as “two-point discrimination” with regards to thelocation and angle of safety razor while simultaneously grantingeffective navigation over challenging muscular and skeletal terrain onthe backside and body.

FIG. 21 illustrates a side view of an elongated back shaver handle 315and a safety razor 105 removably attaching to the elongated handle 315according to embodiments of the present inventions. The elongated handle315 is generally an s-shaped elongated member 315 having a surface alonga length of the elongated handle 315 defining an inner side 485, anouter side 475, a blade end 325 and a grip end 355 and the blade end 325opposite the grip end 355 and the said outer side 475 opposite the innerside 485 and having a finger surface grip 395 located on the inner side485 of the elongated handle 315. The inner side 485, the outer side 475,the blade end 325, and the grip end 355 join one another to create anoutside surface of the elongated member 315 that is substantially smoothand a cross-sectional shape of the elongated member 315 near the midwayis substantially smooth having a shape that is substantially round oroval and a handle attachment 295 at the blade end 325 of the elongatedmember 315 opposite the grip end 355 and the handle attachment 295located on the inner side 485 of the elongated handle member 315 and theblade end 325 comprises a handle clip 365 used to lock and release thesafety razor 105 in the handle attachment 295.

The handle attachment 295 removably attaches the safety razor 105 fortactile feedback to a blade attachment of the elongated handle 315. Thesafety razor 105 has at least a blade group 265 protruding away from asubstrate structure 215 of the safety razor 105 located on the innerside 485 of the elongated handle 315 facing against the torso backsideof the user or in FIG. 21 facing against a flat skin surface planereferenced as plane A. It should be noted that when discussing the torsothe breast tissue is not considered part of the torso. FIG. 21illustrates the blade group 265 and a support 275 which, in FIG. 21, thesupport 275 takes the form of a secondary blade group. The blade group265 and support 275 are protruding at an angle away from a front surface375 of the safety razor 105. In order to illustrate the difference inangle between the front surface of the substrate structure 215 inrelation to the top side 595 of the blade group 265 or support 275 thefront surface, in FIG. 21, is with a dashed line. A substrate structure215 adapts the tip or top side 595 of the blade group 265 or the topside 595 of the support 275 at an angle of about 75 degrees or less inrelation to the front surface 375 of the substrate structure 215. Apreferred angle between the top side 595 of the blade group 265 and thefront surface 375 of the substrate structure 215 is about 20 degrees.Another way to measure this angle is by comparing the angle of amidpoint of a portion of a non-flexing sharp blade 115 which isreferenced as midpoint H, to the front surface 375 of a substratestructure 215 of the safety razor 105. The midpoint H of a non-flexingportion of a sharp blade 115 is referenced as midpoint H which isillustrated in FIG. 21 with a dashed line. For the purpose ofillustrating angle the front surface 375 of the substrate structure 215is illustrated with a dashed line. The angle between the front surface375 of the substrate structure 215 or the safety razor 105 in relationto the midpoint H is referenced as angle Y. Angle Y is 75 degrees orless. A preferred angle of angle Y is about 20 degrees. A similar anglethat may be used is the angle between the midpoint H in relation to aflat skin plane A which is referenced as angle M. If the skin plane A isflat then angle M will be similar to angle Y.

The support 275 may take the form of a blade group or an alternativeembodiment but having at least one blunt protrusion or bump sufficientfor safely poking into the skin surface A. The support 275 may comprisemore than one blunt protrusion wherein each blunt protrusion may be atstaggered locations. In fact, in another alternate embodiment there maybe three blunt protrusions 276 at staggered locations. As will beillustrated in the upcoming FIGS. 47 and 48 a support 275 may comprise abump or blunt tip or blunt protrusion 276 as illustrated. The support275 in further alternate embodiments, rather than another blade group orblunt protrusion 276, the support 275 may take the form of a lubricationstrip, soap, or an electric trimmer, wherein each may have a bluntprotrusion 276 for safely poking. There may also be other items that maybe removably attached to the substrate structure 215 which would prove abenefit to a user for the sake of other methods of pre or post shavingefforts.

The blade group 265 and the support 275 spaced a distance sufficient toachieve discrimination such as two-point discrimination on the flat skinplane A of a user and a tactile discrimination distance 285 between theblade group 265 and support 275. A tactile discrimination distance 285is any distance gap spaced inside of at least the blade group 265 andthe support 275 and the tactile discrimination distance 285 may have adeep or shallow elevation which is referenced as elevation gap EE. Thetactile discrimination distance 285 may be a tactile distance fortwo-point discrimination. The distance of the tactile discriminationdistance 285 between the blade group 265 and the support 275 may vary onthe area of the body that is going to be shaved. For instance, whenshaving on the back area a preferred tactile discrimination distance forthe human torso between the two points between the blade group 265 blunttip and the support 275 blunt tip is about 35 millimeters or more. Itshould be noted that when discussing the torso the breast tissue is notconsidered part of the torso. The back side human skin surface is amongthe least sensitive portions of the human body and needs a longertactile discrimination distance of about 39 millimeters. These 35millimeter and 39 millimeter tactile discrimination distances arederived from the data cited in Myles and Binseel, 2007 referencingWeinstein, 1968. The tactile discrimination distance 285 allows balanceand stability of the safety razor 105 for two-point discrimination whenstroking against the skin surface A. Two-point discrimination, whichwill be further illustrated and discussed in FIG. 30 and FIGS. 32-33,describes the distance between the tip of the blade group 265 and thesupport 275 are about 35 millimeters on the human torso in order for thetactile two-point discrimination to be effective. It is for this reasonthat about 35 millimeters has been chosen as the preferred distanceinside the blade group 265 tip and the support 275 tip. Tactilediscrimination distance 285 also grants space for a tightened skin toconvex to enter inside of the tactile discrimination distance 285 andinside of the elevation EE without rubbing against the front surface 375of substrate structure 215 while tip of the blade group 265 and support275 allowing a user to maintain an effective angle between the bladegroup 265 and support 275 and the skin surface A without difficulty. Thetactile discrimination distance 285 also creates an effective amount ofdistance between the blade group 265 and the support 275 in order toallow two-point discrimination to occur which will be furtherillustrated and described in the upcoming FIG. 30 and FIGS. 32-33.

A body leverage surface 495 is located on the outer side 475 of theelongated member 315 near a midway between the blade end 325 and thegrip 395 and the blade end 325 configured to press the body leveragesurface 495 against a user's forearm when the grip 395 is respectivelygripped by fingers and hand by a same arm of the user located on theinner side 485 of the elongated handle member 315 and a thumb of thehand facing away from the blade end 325 of the elongated member 315while the long handle 315 is reaching the blade end 325 under an armpitof the same arm of the user to leverage the handle attachment 295located on the inner side 485 of the elongated handle 315 against atorso backside of the user. This will be further illustrated in theupcoming FIGS. 27-37. It should be noted that when discussing the torsothe breast tissue is not considered part of the torso.

The safety razor 105 for point discrimination is highly dependent oncreating safe pokes or gouges into the skin surface A in order to createindentations that allow a skin convex to form inside of inner guard andouter comb belonging to the blade group 265 or the support 275 which mayalso take the form of a blade group as seen here in FIG. 21. In FIG. 21the blade group 265 and support 275 are only making initial contact withthe skin surface A and are simply touching the skin surface A and arenot safely poking into the skin surface A to establish pointdiscrimination. It can be seen in FIG. 21 the midpoint H of a non-flexedportion of the sharp blade 115 is in a straight line. It will be seen inthe upcoming FIGS. 29-31, FIGS. 42-44 that when the blade group 265 ispressing into the skin surface A, a midpoint of a flexing sharp blade115 will be directed at an alternative angle in relation to the frontsurface 375 of the substrate structure 215 when compared to the midpointH. A safety razor 105 removably connecting to the elongated handle 315is circled in FIG. 21 in order to illustrate the area that will have aclose up view in the upcoming fifth illustration in FIG. 25.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “A” references a flat skin plane surface;    -   “H” references the midpoint section of a non-flexing sharp blade        115;    -   “Y” references the angle between the front surface 375 of a        substrate structure 215 or safety razor 105 in relation to the        midpoint H is referenced as angle Y;    -   “M” references the angle between midpoint H in relation to a        flat skin plane A which is referenced as angle M; and    -   “EE” is an elevation gap inside a blade group 265 and a support        275.

FIG. 22 illustrates a front view of a back shaver handle 315 having asurface along a length of the elongated handle member 315 having ahandle clip 365 and the elongated handle 315 defining a left handle side525, a right handle side 535, an inner side 485, an outer side 475, anda blade end 325 wherein the left handle side 525 is opposite the righthandle side 535 and the inner side 485 is opposite the outer side 475and the blade end 325 between the left handle side 525 and right handleside 535. Although the safety razor 105 is illustrated in FIG. 22 asremovably attaching to the elongated handle 315, the safety razor 105 isnot included when referencing the left handle side 525 and the righthandle side 535 of the elongated handle 315. The safety razor 105 havinga left side of safety razor 505 and a safety razor right side 515 and atop side 335 wherein the left side of safety razor 505 is opposite thesafety razor right side 515. The elongated handle 315 having an opening565 allowing a user access the safety razor 105 in order to clean thesafety razor 105 without having to remove the safety razor 105 fromelongated handle 315 after performing shaving strokes. Often times shornhair will get caught or stuck inside of safety razors. Safety razorssuch as the one presented within require a cleaning brush to stroke theouter comb or even inner guard in order to thoroughly and effectivelyclean most of the shorn hairs out of the safety razor 105. Thus, anopening in the elongated handle 315 near the blade end 325 would provebeneficial in allowing a user to save time and effort and keep thesafety razor 105 for tactile feedback removably attaching to theelongated handle 315 when performing a cleaning.

FIG. 23 illustrates a front view of an inner side 485 of an elongatedback shaver handle 315 near the blade end 325 wherein said handle 315 isremovably attaching to a safety razor 105 for tactile feedback whereinthe elongated handle 315 having a left handle side 525 and a righthandle side 535 and a blade end 325 and wherein the left handle side 525is opposite the right handle side 535. The elongated handle 315 havingan opening 565 allowing a user access to clean the safety razor 105after performing shaving strokes. The elongated handle 315 having ahandle clip 365 which is inside the opening 565 allowing the user topress the handle clip 365 in order to allow the safety razor 105 toremove itself from the elongated handle 315.

The safety razor 105 for two point discrimination having a top side 335a bottom side 345 and a safety razor left side 505 and a safety razorright side 515 wherein the top side 335 is opposite the bottom side 345and the safety razor left side 505 is opposite the safety razor rightside 515. A front surface 375 of a substrate structure 215 of the safetyrazor 105 is illustrated wherein the substrate structure 215 isremovably attaching with a blade group 265 and a support 275 and thesupport 275, in FIG. 23, is taking the form of a secondary blade group.In FIG. 23 the blade group 265 and the support 275 both have an outercomb 145 and an inner guard 135 and a sharp blade 115 inside of theouter comb 145 and the inner guard 135. In another embodiment there maybe multiple inner guards 135 and the sharp blade 115 inside of saidmultiple inner guards 135. It can be seen that a tactile discriminationdistance 285, which was earlier explained as a gap for two pointdiscrimination, is illustrated inside of a tip of both the blade group265 and the support 275. Furthermore, even though in FIG. 23 the support275 is closer to the top side 335 of the safety razor 105 it should beknown that in an alternative embodiment the support 275 and the bladegroup 265 may switch positions wherein the blade group 265 is closer tothe top side 335 of the safety razor 105 and inside the top side 335 andthe support 275.

FIG. 24 illustrates a rear view of a back shaver handle 315 having asurface along a length of the elongated member 315 defining a lefthandle side 525 and a right handle side 535 a blade end 325 and a gripend 355 and the left handle side 525 opposite the right handle side 535and the grip end 355 opposite the blade end 325 and between the lefthandle side 525 and right handle side 535. A safety razor 105 is notincluded when referencing the left handle side 525 and the right handleside 535 of the elongated handle 315. The elongated member 315 having asurface along a length of the elongated handle 315 defining an innerside 485 and an outer side 475 wherein the inner side 485 is oppositethe outer side 475 and a having a finger surface grip 395 located on theinner side 485 of the elongated handle 315 and wherein the inner side485, the outer side 475, the blade end 325, and the grip end 355 joinone another to create an outside surface of the elongated back shaverhandle 315. The elongated back shaver handle 315 removably attaching toa safety razor 105 for tactile feedback and the safety razor 105 havinga front surface 375, a rear surface 385, a safety razor left side 505, asafety razor right side 515 wherein the front surface 375 is oppositethe rear surface 385 and the safety razor left side 505 is opposite thesafety razor right side 515. A blade group 265 is extending from thefront surface 375 of the safety razor 105. The elongated handle 315having an opening 565 allowing a user access to clean the safety razor105 after performing shaving strokes. Finally, a body leverage surface495 is illustrated midway the grip 395 and the blade end 325 on theouter side 475 of the elongated handle 315.

FIG. 25 illustrates an up-close side view of a portion of the previouslyillustrated and circled elongated handle 315 removably attaching to thesafety razor 105 for tactile feedback along the skin surface plane A inthe prior FIG. 21. The safety razor 105 has a blade group 265 and asupport 275 according to embodiments of the present inventions. Theelongated handle 315 having a blade end 325. In FIG. 25 a substratestructure 215 adapted to hold both the blade group 265 and the support275 the on a front surface 375 of the substrate structure 215 with theblade group 265 and the support 275 spaced a tactile discriminationdistance sufficiently wide enough to achieve tactile feedback feltthrough a torso region of the skin of the user perceived between theblade group 265 and the support 275 and wherein the substrate structure215 is adapted such that no elements within the tactile distance producea tactile sensation on the skin surface A. It should be noted that whendiscussing the torso the breast tissue is not considered part of thetorso. Two-point discrimination, which will be further illustrated anddiscussed in FIG. 30 and FIGS. 32-33, describes the distance between thetip of the blade group 265 and the support 275 are about 35 millimeterson the torso in order for the tactile two-point discrimination to beeffective. It is for this reason that about 35 millimeters has beenchosen as the preferred distance inside the blade group 265 tip and thesupport 275 tip. The substrate structure 215 is adapted to hold both theblade group 265 and the support 275 a distance measured from a leadingedge of the blade group 265 to a trailing edge of the support 275 of aminimum of at least 1.59 millimeters.

The substrate structure 215 is further adapted to additionally provide atactile discrimination distance between the blade group 265 and thesupport 275 spaced sufficiently wide enough to achieve pointdiscrimination tactile feedback felt on the skin of the user between theblade group 265 and the support 275. The blade group 265 and the support275 each extend from the front surface 375 of the substrate structure215 at a height X or elevation EE sufficient to avoid loose skin of theuser touching the front surface 375 of the substrate structure 215within the tactile discrimination distance spaced between the bladegroup 265 and the support 275 and loss of point discrimination. In FIG.25 a support 275 comprises another blade group comprising another sharpblade 115 and another guard 135 parallel to the another sharp blade 115.The substrate structure 215 is adapted with the blade group 265 and thesupport 275 are also spaced a tactile discrimination distancesufficiently wide enough to achieve point discrimination tactilefeedback felt through on a backside torso region of the skin of the userperceived between the blade group 265 and the support 275. It should benoted that when discussing the torso the breast tissue is not consideredpart of the torso. Each of the different blade groups may have differentangles in relation to the substrate structure 215. In another embodimenta plurality of blade groups 265 arranged in parallel rows on a frontsurface 375 of the substrate structure 215, each of the blade groups 265spaced a distance there between, each of the blade groups 265. The bladegroup 265 and the support 275 are spaced a tactile leverage feedbackdistance sufficiently wide enough to provide leverage feedback feltthrough the elongated back shaver handle 315 for the user to maintain aconsistent angle of the sharp blade 115 relative to the skin surfacewhen an arm of the user reaches the elongated back shaver handle 315 tothe user's backside during shaving movement over a shoulder blade peakor a spine depression.

The safety razor 105 in FIG. 25 is removably attached by a handleattachment 295 and a handle clip 365 configured to allow a user to pressin order to grant the handle attachment 295 to remove itself from theelongated handle 315. The handle attachment 295 may remove itself bysliding out of the elongated handle 315. In another embodiment thehandle attachment 295 may be embodied on the elongated handle 315wherein the safety razor 105 accepts the handle attachment 295 of theelongated handle 315. The safety razor 105 having a rear surface 385, afront surface, a top side 335 and a bottom side 345 wherein the rearsurface 385 is opposite the front surface 375 and the top side 335 isopposite the bottom side 345.

The support 275 in FIG. 25 takes the form a blade group and the bladegroup 265 and the support 275 both comprising a sharp blade 115 with asharp edge 125 and an inner guard 135 parallel to the sharp blade 115 ona trailing side of the sharp blade 115 opposite an outer comb 145wherein the outer comb 145 parallel to the sharp blade 115 on a leadingside of the sharp blade 115 and a substrate structure 215 adapted tohold a blade group 265 and the support 275 on the front surface 375opposite the rear surface 385 of the substrate structure 215 with theblade group 265 and support 275 spaced a distance sufficient to achievepoint discrimination on the skin of a user between the blade group 265and support 275. The inner guard 135 having an outer edge 185 and atrailing opening J wherein the trailing opening J is inside of the outeredge 185 and the sharp edge 125 of the sharp blade 115. The outer comb145 having an inside edge 195 and a leading opening G wherein theleading opening G is inside of the inside edge 195 and the sharp edge125 of the sharp blade 115. A suppleness distance is measured betweenthe inside edge 195 of the outer comb 145 and the outer edge 185 of theinner guard 135 of the blade group 265. The suppleness distance isnarrower than tactile discrimination distance 285 spaced between theblade group 265 and support 275, which said support 275 is a blade groupin FIG. 25.

The substrate structure 215 adapted to hold the blade group 265 and asupport 275 on the front surface 375 of the substrate structure 215 withthe blade group 265 and the support 275 spaced a distance sufficient toachieve two-point discrimination on the skin A of a user between theblade group 265 and the support 275 and the support 275 and the bladegroup 265 extend from the front surface 375 of the substrate structure215 of the safety razor 105 at a height X or elevation EE sufficient toavoid loose skin of the user touching and rubbing the front surface 375of the substrate structure 215 which would interfere with a shavingstroke. This loose skin is more clearly illustrated in upcoming FIG. 30as a skin convex CC inside blade group 265 and support 275. In FIG. 25the front surface 375 of the substrate structure 215 comprising one ormore grooves parallel from each other and adapted to removably hold atleast one blade group 265 and support 275. The front surface 375 of thesubstrate structure 215 further comprises a second groove 675 adapted toremovably hold the support 275 inserted therein and configured parallelto the first groove 305 spaced the tactile leverage distancesufficiently wide enough to provide the tactile leverage feedback feltthrough the elongated back shaver handle 315 for the user to maintainthe consistent angle of the sharp blade 115 relative to the skin surfaceA when an arm of the user reaches the elongated back shaver handle 315to a backside of the user during shaving movement over a shoulder bladepeak or a spine depression on the backside.

In FIG. 25 there is a first groove 305 and a secondary groove 675. Bothgroove 305 and the secondary groove 675 will be more clearly illustratedin the upcoming FIGS. 47-48. The grooves allow a user an option tochoose a preferred distance for two point discrimination between theblade group 265 and the support 275 which will be further illustrated inthe upcoming FIGS. 45-46. The blade group 265 and the support 275 mayattach to a groove by method of a clip 175 with a spring or a snap-lockby inserting the blade group 265 or support 275 into a groove from thefront surface 375 of the substrate structure 215 until the clip 175snaps into place. It is commonly known there are many alternativemethods in which holding and securing the blade group 265 and thesupport 275 which would also suffice. In another embodiment the handleattachment 295 designed to removably attach and temporarily hold thesafety razor 105 may be embodied on or near the top side 335 or bottomside 345 of a safety razor 105 In one embodiment the blade group 265 orsupport 275 may slide into a groove 305 or a secondary groove 675 fromthe left attachment side 545 or the right attachment side 555 of thesafety razor 105 as will be illustrated in the upcoming FIG. 58. In FIG.25 the first groove 305 and secondary groove 675 are illustrated. Firstgroove 305 is removably holding the blade group 265 while secondarygrove 675 is removably holding the support 275. Grooves allow a user anoption to choose a distance between the blade group 265 and the support275.

The substrate structure 215 adapts the tip or a top side 595 of theblade group 265 or support 275 at an angle of about 75 degrees or lessin relation to the front surface 375 of the substrate structure 215. Apreferred angle between the top side 595 of the blade group 265 inrelation to the front surface 375 of the substrate structure 215 is 20degrees.

The support 275 may take the form of a blade group or an alternativeembodiment having a least one blunt protrusion 276 sufficient for safelypoking into the skin surface A. The support 275 may comprise more thanone blunt protrusion 276 wherein each blunt protrusion may be atstaggered locations. As will be illustrated in the upcoming FIGS. 47-48a support 275 may comprise a bunt tip or bump or blunt protrusion beinga soap strip, a lubrication strip, or an electric trimmer each having ablunt protrusion.

A tactile discrimination distance 285 is a gap spaced inside of at leastthe blade group 265 and the support 275 and sufficiently spaced fortwo-point discrimination. The tactile discrimination distance 285 mayhave an elevation gap EE which may be a deep or shallow gap. Theelevational gap EE is inside the blade group 265 and support 275 as wellas inside of the tactile discrimination distance 285 and the frontsurface 375 of the safety razor 105. When shaving the back the substratestructure 215 holds the blade group 265 and the support 275 spaced thetactile discrimination distance greater than about 35 millimeters.However, other more sensitive areas of the body may require lessdistance. The tactile discrimination distance 285 allows balance andstability of the substrate structure 215 when stroking against the skinsurface A. The tactile discrimination distance 285 also grants space fora tightened skin to convex to enter inside of the tactile discriminationdistance 285 without rubbing against the front surface 375 of thesubstrate structure 215 while allowing a user to maintain an effectiveangle between the blade group 265 and the support 275 and the skinsurface A without difficulty. The tactile discrimination distance 285also creates an effective amount of distance between the blade group 265and support 275 in order to allow point discrimination to occur. Theelevation gap EE, which in FIG. 25 is illustration with dashed lines,allows a skin convex to enter when the safety razor 105 for pointdiscrimination is pressing into the skin surface A.

The height from tips of each of the blade group 265 and the support 275to the front surface 375 of the substrate structure 215 is referenced asheight X and is 3.81 mm or more in order to avoid the loose skin of theuser touching the front surface 375 of the substrate structure 215. In apreferred embodiment height X is about 3.81 mm and wherein the substratestructure 215 holds the blade group 265 and the support 275 spaced atactile discrimination distance about 35 millimeters or greater.However, other more sensitive areas of the body may require lessdistance. Both the blade group 265 and the support 275 have the top side595 and bottom side 605 which is opposite the top side 595. A midpointof a non-flexing portion of a sharp blade 115 referenced as midpoint Hmay be between about 0-75 degrees in relation to the front surface 375of the substrate structure 215. A preferred angle from the tip or thetop side 595 of the blade group 265 in relation to the front surface 375of the substrate structure 215 is about 20 degrees. In FIG. 25 thesafety razor 105 for two-point discrimination is shown prior to gougingand indenting into the skin surface A while the opposite side view ofthis embodiment being identical according to a first embodiment of thepresent inventions. In FIG. 25 the support 275 comprises another bladegroup 265 comprising another sharp blade 115 having another leading sideand another trailing side for shaving the hair and another outer comb145 next to and parallel to the another leading side of the anothersharp blade 115 and another inner guard 135 next to and parallel to theanother trailing side of the another sharp blade 115.

The front surface 375 of the substrate structure 215 is represented by adashed line in order to clearly illustrate angle Y. Y represents theangle between the front surface 375 in relation to the midpoint H of aportion of a non-flexing sharp blade 115. The angle between the midpointH in relation to the flat skin plane A is angle M. Angle M may also bebetween about 0-75 degrees in order for a safety razor 105 for two-pointdiscrimination to shave a stroke properly and effectively. A preferredangle of the tip or the top side 595 of the blade group 265 in relationto the front surface 375 of the substrate structure 215 is about 20degrees. Finally, a circle is illustrated around the cutting area of ablade group 265. The circled area will be illustrated in a close-upschematic cross-sectional view in the upcoming FIG. 26.

The safety razor 105 for tactile feedback is highly dependent oncreating safe pokes or gouges into the skin surface A in order to createindentations that allow a first skin convex to form inside of the innerguard 135 and outer comb 145 and a second skin convex inside the tactilediscrimination distance 285. In FIG. 25 the outer edge 185 and the outerteeth inside edge 195 make initial contact with the skin surface A. Atthis point the inner guard 135 and outer comb 145 are simply touchingthe skin surface A and are not gouging into skin surface A. Finally, thesupport 275 and blade group 265 extend from the front surface 375 of thesubstrate structure 215 and creating a height X or EE which is theheight inside of the tips of both the blade group 265 and the support275 to the front surface 375 of the substrate structure 215. Height X isabout 3.81 millimeters or more. Height X or EE is sufficient to avoidloose skin of the user touching and rubbing the front surface 375 of thesubstrate structure 215 which would interfere with a shaving stroke. Inalternative embodiments the handle attachment 295 may located on theelongated handle 315 or the safety razor 105 or both the elongatedhandle 315 and safety razor 105. In FIG. 25 it can be seen that thesafety razor 105 is removably attaching with the elongated handle 315 onthe rear surface 385 of the safety razor 105. It alternative embodimentsthe safety razor may removably attach with the elongated handle 315 atthe top side 335, the bottom side 345 or even the front surface 375 or acombination of them. Finally, the handle attachment 295 may have aspring allowing flexibility in the angle between the safety razor 105and the elongated handle 315. There is a relationship between thetactile discrimination distance 285 and the distance of height X aspresented herein. It is desired to prevent the front surface 375 of thesubstrate structure 215 from rubbing against the skin surface A during ashaving stroke. That being said, the greater the tactile discriminationdistance 285 the greater the dimension of height X. Just the same, whenthe lesser the tactile discrimination distance 285 the lesser thedimension of height X.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “X” references a height from tips of a blade group 265 and a        support 275 to a front surface 375 of a substrate structure 215;    -   “J” references a trailing opening inside a sharp blade 115 and        an outer edge 185 of inner guard 135;    -   “G” references a leading opening inside a sharp edge 125 of a        sharp blade 115 and an inside edge 195 of an outer comb 145; and    -   “Y” represents an angle between front surface 375 in relation to        a midpoint H portion of a non-flexing sharp blade 115.

FIG. 26 illustrates a close up cross-sectional view of a blade group 265which was circled in the prior FIG. 25 according to embodiments of thepresent inventions. The blade group 265 comprising at least one sharpblade 115 comprising a sharp edge 125 facing towards a skin surface Acomprising an outer comb 145 comprising an inside edge 195, a combinside wall 645 inside of the sharp edge 125 and inside edge 195 and aninner guard 135 comprising an inner guard outer edge 185, an inner guardinside end 235 and an inner guard inside wall 665 inside the outer edge185 and the inner guard inside end 235. The comb inside wall 645 isadjacent to the sharp blade 115 and is inside the inside edge 195 andthe sharp edge 125 of the sharp blade 115. Inner guard inside end 235 isembodied where the inner guard 135 and the sharp blade 115 meet. Aninside portion of the outer comb 145 removed in order to create a deepvoid 165. The sharp blade 115 is fixedly anchored on a sharp blade end225 opposite the sharp edge 125 of sharp blade 115. A supplenessdistance is measured between the inside edge 195 of the outer comb 145and the outer edge 185 of the inner guard 135 of the blade group 265.Also the suppleness distance is narrower than tactile discriminationdistance 285 spaced between the blade group 265 and support 275, whichsaid support 275 is a blade group in FIG. 26. A base 205 is positionedto create a level of distance between the base 205 and the sharp edge125 of the sharp blade 115 in order to enable a controlled level offlexibility with the sharp blade 115. The deep void 165 is spacedintermediately of the outer comb 145 and sharp blade 115. Deep void 165thickness allowing a level of control over the flexibility of the sharpblade 115 as well as over-exposure of the sharp blade 115. The thicknessof the deep void 165 is represented as K. Thickness K is 1.016millimeters or less. In a preferred embodiment distance thickness K isabout 0.381 millimeters. Thickness K of deep void 165 may run thickerbut the danger of enabling the sharp blade 115 to become like a daggerin relation to the skin surface becomes increasingly probable. The levelof distance of the deep void 165 between the base 205 and the sharp edge125 of the sharp blade 115 is referenced as L. The distance L is about4.572 millimeters or less. A preferred distance of distance L is about2.032 or less. Distance L may be less or greater than the preferreddistance. However, if the distance of distance L becomes much greaterthan 4.572 millimeters then the sharp blade 115 will start to bend toomuch and the sharp edge 125 of the sharp blade 115 will run the dangerof not cutting effectively. It should be understood that comb insidewall 645 inside the sharp edge 125 and the inside edge creates a barrierfor a skin surface convex to enter inside of inside edge 195 and outeredge 185 which will be illustrated in the upcoming FIG. 31. The outercomb 145 having an outer wall 155 which in another embodiment may alsobe rounded with an arc instead of a straight wall. The midpoint of aportion of a non-flexing sharp blade 115 is referred to as midpoint Hwhich is illustrated with a straight or flat dashed line. In FIG. 26 theinner guard 135 and outer comb 145 are not indenting into the skinsurface A and thus the sharp blade 115 is not pressing against the skinsurface A and the sharp blade 115 is not flexing.

As seen in FIG. 26 when viewing a close up cross-sectional view of theblade group 265 a portion of the inner guard 135 inside of the outeredge 185 and the sharp edge 125 is removed in order to create a trailingopening J inside of outer edge 185 and sharp edge 125 of the sharpblade. In FIG. 26 the trailing opening J is illustrated as with dashedtriangle inside of the outer edge 185 of the inner guard 135 and thesharp edge 125 of the sharp blade 115. In other alternate embodimentsthe dashed triangle may be a right triangle or an isosceles triangle oran isosceles right triangle. The trailing opening J cross sectional hasthree triangular corners or vertices which have three walls but it isnot a perfect triangle being that the three walls or sides are notalways flat. This is especially true of the sharp blade 115 and the skinsurface A which both flex under pressure. The inner guard inside wall665 of inner guard 135 creates a second wall or side. The inner guardinside wall 665 of the inner guard 135 does not need to be a straightwall but in another embodiment may be rounded with an arc. The skinsurface A is the third and final wall or side which also deforms andwill convex. The skin needs to deform inside the trailing opening J inorder for the sharp blade 115 to access the base of a hair 415 whichresults in a shave that leaves a smooth skin surface after a shavingstroke. In FIG. 26 the first of the vertices is where the inner guardinside end 235 and the sharp blade 115 meet. The second of the verticesis where the sharp blade 115 and skin surface plane A intersect. Thesecond vertex may also be where the sharp edge 125 of the sharp blade115 and the skin surface plane A meet. The third of the vertices iswhere the skin surface A and the outer edge 185 of the inner guard 135meet. The vertices work to together to form the planes that createtrailing opening J or void in order for the trailing opening J to allowfor a sufficient opening or void for tightening skin to enter and convexinside of the blade group 265 which is illustrated in the upcoming FIGS.29-31. It should also be known that the inner guard inside wall 665 andthe comb inside wall 645 controls the amount of skin convex allowedinside the blade group 265. As will be illustrated in the upcoming FIGS.29-31 a skin convex is referenced as T and the inner guard 135 outeredge 185 and the outer comb 145 inside edge 195 simultaneously dig intothe skin surface A in order to tighten the skin so that when the hair ispresented to the sharp blade 115 the root or base of the hair 415 isbeing greatly exposed. In FIG. 26, a leading opening G is inside ofinside edge 195 and the sharp edge 125 of the sharp blade 115. Theleading opening G allowing a sufficient opening in order for a skinconvex to safely press against the sharp edge 125 of the sharp blade 115when pressing the blade group 265 against the skin surface A. It can beseen in FIG. 26 the outer wall 155 of the outer comb 145 and the skinplane A create a vertex of a leading side imaginary triangle referencedas vertex O. Vertex O is created in order to allow the outer comb 145 tobetter indent into the skin surface A allowing the blade group 265 toshave properly and for better tactile feedback.

It can be seen that the sensors that require pressure in order totrigger such as the Pacinian Corpuscle 425 and the Ruffini's Corpuscle435 are not yet being triggered since there is only light touch betweenthe blade group 265 and the skin surface A. Only the hairs 415 maydetect the light touch. It can be seen in the illustration the tissuesub layers and the sensors within each layer which include the Epidermis445, the Dermis 455 and the Hypodermis 465.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “L” references a deep void 165 running lengthwise from inside        edge 195 of outer teeth 145 to a base 205 which allows ample        space for the preferred flexibility of a sharp blade 115 to the        inside of a outer comb 145;    -   “K” references a thickness of a deep void 165 between an outer        comb 145 and a sharp blade 115 which is a contributing factor in        the amount of allowed inverted skin convex T as well as the        level of flexibility a sharp blade 115 illustrates against        inverted skin convex T when shaving; and    -   “O” references a void inside an outer wall 155 of an outer comb        145 and a flat skin surface plane A.

FIGS. 27-28 illustrate aerial views of a two-sided back shaver handlegripped by a user extended under the armpit towards the backsideaccording to embodiments of the present inventions. The elongated handle315 removably attaching to a safety razor 105 for tactile feedback and,in some embodiments, using leverage feedback, when gripped by a userextended under the armpit towards the backside according to embodimentsof the present inventions. A handle attachment 295 on the safety razor105 is coupled with the long handle 315 gripped by a user extended underthe armpit towards the backside. The user feeling within the hand of theuser on the grip 395 of the elongated handle 315 a leverage feedbackfrom both the blade group 265 and the support 275 against the backsideskin.

A substrate structure 215 is adapted to removably hold at least theblade group 265 and a support 275. In FIGS. 27-28 a substrate structure215 operatively coupled to the blade end 325 of the elongated backshaver handle 315, wherein the substrate structure 215 is adapted tohold both the blade group 265 and the support 275 on a front surface 375of the substrate structure 215 with the blade group 265 and the support275 spaced a tactile leverage feedback distance sufficiently wide enoughto provide leverage feedback felt through the elongated back shaverhandle 315 for the user to maintain a consistent angle of the sharpblade relative to the skin surface when an arm of the user reaches theelongated back shaver handle 315 to a backside of the user duringshaving movement over a shoulder blade peak or a spine depression on thebackside. The blade group 265 and the support 275 each extend from thefront surface 375 of the substrate structure 215 at least 0.381centimeters to avoid loose skin of the user touching the front surface375 of the substrate structure 215 within the distance spaced betweenthe blade group 265 and the substrate structure 215. In FIGS. 27-28 thesupport 275 comprises another blade group comprising another sharp blade115 and another guard 135 parallel to another sharp blade 115.

The front surface 375 of the substrate structure 215 further comprises asecond groove 675 adapted to removably hold the support 275 insertedtherein and configured parallel to the first groove 305 spaced thetactile leverage feedback distance sufficiently wide enough to providethe tactile leverage feedback felt through the elongated back shaverhandle 315 for the user to maintain the consistent angle of the sharpblade 115 relative to the skin surface A when an arm of the user reachesthe elongated back shaver handle 315 to a backside of the user duringshaving movement over a shoulder blade peak or a spine depression on thebackside. The substrate structure 215 is adapted with the blade group265 and the support 275 are also spaced a tactile discriminationdistance sufficiently wide enough to achieve tactile feedback tactilefeedback felt through on a backside torso region of the skin of the userperceived between the blade group 265 and the support 275. The support275 comprises at least one blunt protrusion. The blade group 265 and thesupport 275 are spaced a tactile leverage feedback distance sufficientlywide enough to provide leverage feedback felt through the elongated backshaver handle 315 for the user to maintain a consistent angle of thesharp blade 115 relative to the skin surface when an arm of the userreaches the elongated back shaver handle 315 to the user's backsideduring shaving movement over a shoulder blade peak or a spinedepression.

The safety razor 105 in FIGS. 27-28 having a blade group 265 and asupport 275 which in FIGS. 27-28 the support 275 takes the form of anadditional blade group. In FIG. 25 the support 275 comprises anotherblade group 265 comprising another sharp blade 115 having anotherleading side and another trailing side for shaving the hair and anotherouter comb 145 next to and parallel to the another leading side of theanother sharp blade 115 and another inner guard 135 next to and parallelto the another trailing side of the another sharp blade 115. In FIGS.27-28 the safety razor 105 attaches to the elongated handle 315. Thehandle attachment 295 also attaches to the elongated handle 315. Thesafety razor 105 has the blade group 265 and the support 275 attached onan inner side 485 of the back shaver handle 315 facing against the torsobackside of the user. It should be noted that when discussing the torsothe breast tissue is not considered part of the torso. The elongatedhandle 315 has a surface along a length of the elongated handle 315defining the inner side 485 and an outer side 475 and a blade end 325and a grip end 355 wherein the outer side 475 opposite the said innerside 485 and the blade end 325 opposite the grip end 355 and theelongated handle 315 having a finger surface grip 395 located on theinner side 485 of the elongated handle 315. The handle attachment 295 isat the blade end 325 of the elongated handle 315. The blade end 325 islocated at an end of the elongated handle 315 opposite the grip end 355.The handle attachment 295 is located on the inner side 485 of theelongated handle 315. The handle attachment 295 comprises a handle clip365 used to lock and release the safety razor 105 for tactile feedbackin the elongated handle 315. The handle attachment 295 attaches to thesafety razor 105 with at least one blade group 265 and a support 275protruding away from the safety razor 105 on the inner side 485 of theback shaver handle 315 facing against the torso backside of the user.

A body leverage surface 495 is located on the outer side 475 of thetwo-sided back shaver handle 315 near a midway between the grip 395 andthe blade end 325 and the blade end 325 configured to press the bodyleverage surface 495 against a user's forearm when the grip 395 isrespectively gripped by fingers and hand by a same arm of the userlocated on the inner side 485 of the back shaver handle 315 a thumb ofthe hand facing away from the blade end 325 of the s-shaped back shaverhandle 315 and the elongated handle 315 is reaching the blade end 325under an armpit of the same arm of the user to leverage the handleattachment 295 located on the inner side 485 of the elongated handle 315against a torso backside of the user. It should be noted that whendiscussing the torso the breast tissue is not considered part of thetorso. As seen in FIGS. 27-28 when the grip 395 is respectively grippedby fingers and hand by a same arm of the user the user is illustratedpressing the body leverage surface 495 located on the outer side 475 ofthe back shaver handle 315 near a midway between the grip 395 and thehandle attachment 295 and configured to press the body leverage surface495 against a user's forearm, in which the fulcrum is referenced as F,in order to leverage the handle attachment 295 located on the inner side485 of the back shaver handle 315 against a torso backside of the userand leveraging the back shaver handle 315 using the body leveragesurface 495 as a fulcrum F relative to the grip 395 to press the bladeend 325 towards the torso backside of the user and stroking the bladeend 325 against the torso backside of the user.

A portion of the safety razor 105 inside of the blade group 265 andsupport 275 is removed in order to create tactile discriminationdistance 285. A tactile discrimination distance 285 is inside of twosupports at about 35 millimeters. The tactile discrimination distance285 having an elevational gap EE that may be shallow or deep and thedistance of the tactile discrimination distance 285 between the bladegroup 265 and support 275 may vary. The tactile discrimination distance285 serves multiple purposes. The first purpose of the tactilediscrimination distance 285 is chosen to allow a user to find aneffective cutting angle between the blade group 265 and skin surfacewith ease. Also the tactile discrimination distance 285 separates theblade group 265 and the support 275 allowing them to stabilize oneanother when stroking against the skin surface. The tactilediscrimination distance 285 can also create an effective amount ofdistance between the blade group 265 and the support 275 in order toallow two-point discrimination which will be further discussed andillustrated in the upcoming FIG. 30 and FIGS. 32-33. The tactilediscrimination distance 285 also grants space for a skin convex to enterinside of the blade group 265 and the support 275 which is illustratedas skin convex CC in FIG. 8. It can be seen in FIG. 8 that the tactilediscrimination distance 285 is allowing skin convex CC to enter andpreventing the skin convex CC from pressing against the front surface375 of the safety razor 105 and interrupting the shaving process.

It can be seen in FIG. 27 a portion of the elongated handle 315 and thesafety razor 105 is circled. The upcoming FIG. 29 will offer a close upillustration of the portion circled here in FIG. 27. Furthermore, it canbe seen in FIG. 28 a portion of the elongated handle 315 and the safetyrazor 105 is circled. The upcoming FIG. 30 will offer a close upillustration of the portion circled here in FIG. 28. In FIGS. 27-28 theblade group 265 is pressing into the skin and is creating an indentationinto the skin creating skin convex T inside the blade group 265.

It can be seen in FIGS. 27-28 the grip 395 is respectively gripped byfingers and hand by a same arm of the user the user is illustratedpressing the body leverage surface 495 against a user's forearm, inwhich the fulcrum is referenced as F, in order to leverage the handleattachment 295 located on the inner side 485 of the back shaver handle315 against a torso backside of the user and leveraging the back shaverhandle 315 using the body leverage surface 495 as the fulcrum F relativeto the grip 395 to press the blade end 325 which is opposite the gripend 355, towards the torso backside of the user and stroking the bladeend 325 against the torso backside of the user. It should be noted thatwhen discussing the torso the breast tissue is not considered part ofthe torso. One difference when comparing FIG. 28 to FIG. 27 is that inFIG. 28 the support 275, which takes the form of a secondary bladegroup, is now pressing into the skin and with force is creating a skinconvex referred to as U along with the blade group 265 which is creatingskin convex T. Since the blade group 265 and support 275 are pressinginto the skin a skin convex CC is illustrated inside the blade group 265and support 275. In FIG. 28 both the blade group 265 and the support 275are in position and through leverage feedback the user tactically feelsleverage feedback through the handle and can feel that the safety razor105 is at the correct angle according to one leverage feedbackembodiment.

FIGS. 27-28 provide one embodiment for illustration of a tactileleverage feedback distance. When the tactile leverage feedback distanceis sufficiently wide, leverage feedback felt by the user through theelongated back shaver handle for the user to maintain a consistent angleof the sharp blade relative to the skin surface when an arm of the userreaches the elongated back shaver handle to a backside of the userduring shaving movement over a shoulder blade peak or a spine depressionon the backside. As seen in FIG. 27 a user presses the blade group 265into the user's own back. In order for the user to gain effectiveleverage feedback felt by the user through the elongated back shaverhandle, the user must grasp and move the grip end 355 away from thefront side of the user. As seen in FIG. 28, in comparison with FIG. 27,the user has moved the grip end 355 further away from the front side ofthe user and the user has pressed the support 275 into their back side.When the support 275 is pressed into the back side, the user feels thisresistance in the handle 315. The resistance is felt in the palm of theuser's hand griping the handle as well between the forearm of the userand the inner side 485 of the handle 315. These feelings of resistancepermit leverage feedback to communicate to the user that the safetyrazor 105 is positioned at a correct cutting angle. It is important tohave the safety razor 105 at the correct cutting angle since the bladegroup 265 and support 275 are positioned at a distance and an angle fromthe front surface 375 of the substrate structure 215.

To achieve the above-described leverage feedback felt through theelongated back shaver handle, the blade group and the support need to bespaced a tactile leverage feedback distance sufficiently wide. (Note asdiscussed elsewhere, the support can be a one or more blunt protrusionsor bump shapes or the support can be one or more another blade groups.)This tactile leverage feedback distance is between the blade group andthe support is the distance measured from the forward most leading edgeand the reward most trailing edge of the blade group and the support. Anexample illustration of the tactile leverage feedback distance 286between the leading edge 195 of a leading blade group 265 and thetrailing edge 185 of an adjacent trailing blade group 275 as a supportwill be illustrated in the upcoming FIGS. 29 and 30. In one embodiment,the tactile leverage feedback distance measured as above described is atleast about 1 inch or 25.4 mm separation. Thus the substrate structurein this one embodiment with the elongated handle would be adapted tohold one or more of blade groups and one or more of supports spaced thetactile leverage feedback distance of at least about 25.4 millimeters(or 1 inch equivalent) measured between outermost edges of a pair ofoutermost blade groups and supports of the substrate structure.

Note that the tactile discrimination distance sufficiently wide enoughto achieve two-point discrimination is felt through by a user throughthe skin of the user, not through the handle to the hand of the user.Because the tactile discrimination distance is felt on the back skin,the tactile discrimination distance should be measured from differentends than the tactile leverage feedback distance. While the tactileleverage feedback distance is measured between the outermost edges of aplurality of blade groups or supports, the tactile discriminationdistance is measured between the widest space between the inside edgesof a pair of an adjacent blade group and support. This tactilediscrimination distance is between an adjacent blade group and supportis the distance measured from the trailing edge and the leading edge ofthe adjacent blade group and support. An example illustration of thetactile discrimination distance 285 between the trailing edge 185 of aleading blade group 265 and the leading edge 195 of an adjacent trailingblade group 275 as a support will be illustrated in the upcoming FIGS.29 and 30.

The straight line length of the elongated handle 315, the height of theblade group 265 and support 275, and the tactile leverage feedbackdistance work in relationship with one another. The elongated handle 315has a straight line length measured directly from the blade end 325 tothe grip end 355 of about 330 mm to about 457.2 mm. A preferred straightline length of the back shaver handle 315 is about 355.6 mm. Thisstraight line length is measured across in a straight line from end toend, not following the curve of the elongated handle 315. In order tocreate a leveled back shaver handle 315 with safety razor 105 in analternate embodiment when the straight line length of the handle 315 isgreater than 355.6 mm then the tactile leverage feedback distance 285becomes greater. In this instance when the straight line length of thehandle 315 is greater than 355.6 mm and a user is gripping the handlenear the grip end 355, the user will begin to lose leverage feedbackwhich desires the tactile leverage feedback distance 285 to increase inorder to maintain effective tactile feedback. Conversely, when thestraight line length of the handle 315 is less than 355.6 mm then thetactile discrimination distance 285 may be less and still maintaintactile feedback for the user. Thus when a length of the elongatedhandle changes, the tactile discrimination distance 285 or tactileleverage feedback distance 286 needs to proportionately change.

To prevent skin from rubbing against or touching the front surface 375of the substrate structure 215, the height EE of the blade group 265 andsupport 275 relative to the substrate needs to be considered. The bladegroup and the support each extend from the front surface of thesubstrate structure at a height sufficient to avoid loose skin of theuser touching the front surface of the substrate structure within thedistance spaced between the blade group and the substrate structure. Thetactile discrimination distance 285 or tactile leverage feedbackdistance 286 also comes into play here. When the tactile discriminationdistance 285 or tactile leverage feedback distance 286 changes, theheight the blade group and the support each extend from the frontsurface of the substrate structure needs to proportionately change. Whenthe tactile discrimination distance 285 or tactile leverage feedbackdistance 286 increases, the height also needs to increase. Conversely,when the tactile discrimination distance 285 or tactile leveragefeedback distance 286 is less, the height EE may also be less. In oneembodiment, for a flat substrate structure, the height X or elevation EEfrom tips of each of the blade group and the support to the frontsurface of the substrate structure is at least 0.381 centimeters.

In other embodiments, as described in the upcoming FIGS. 32-33, thesubstrate structure 215 is adapted with the blade group 265 and thesupport 275 also spaced a tactile discrimination distance 285sufficiently wide enough to achieve two-point discrimination tactilefeedback felt through on a backside torso region of the skin of the userperceived between the blade group 265 and the support 275.

The two-point discrimination study offers an understanding on how thecomponents found within the sensory system may be utilized to establisheffective communication through the sensory system without having toactually view the location where the senses are being activated, or inmy invention, when the blade group 265 and support 275 are safely pokingor gouging the skin on the backside or body. The two-pointdiscrimination illustrates the ability to discern that two or morenearby objects gouging or poking the skin are truly multiple distinctpoints set apart from each other and allowing a user to understand thelocation of each point. It is often tested with points creatingsufficient indents into the skin, as illustrated in my invention, inorder to assure the communication is effective.

In research and clinical studies, two-point discrimination is atechnique for determining tactile agnosia. According to Sir SidneyWeintein, who tested Weber's observations published in year 1834, heagreed with the theory that there is a lack of uniformity of tactilesensitivity found throughout different parts of the body skin. In 1965Sidney Weinstein decided to test the two-point discrimination theory todetermine what areas of the body were more sensitive than others. Infact, he concluded the areas of the body such as the face, lips orfingers require less distance between the two points or indents in orderto distinguish the two points. During the testing, he found the skinsurface located on the back required much more distance between eachpoint in order for the participant to differentiate the two points.However, the exact distance can be influenced based on whether or notthe individual the individual has hair on their back. In hairy skin,Merkel nerve endings are clustered into specialized epithelialstructures called “touch domes” or “hair disks”. An individual with hairgrown in on their backside have additive sensitivity to pressure or skinindentations with the presence of Merkel nerve endings. Merkel nerveendings are found in the basal layer of glabrous and hairy skin and inhair follicles as well. They provide information on pressure and deeptouch which in my invention are provided by a blunt tip of the bladegroup 265 and a blunt tip of the support 275.

Seven non-patent literature publications have been located that explaintactile discrimination including that between two points at differentdistances and locations on human skin surfaces. These were:

-   -   Gemperle, F.; Hirsch, T.; Goode, A.; Pearce, J.; Siewiorek, D.;        Smailigic, A. Wearable Vibro-Tactile Display. Carnegie Mellon        Wearable Group, Carnegie Mellon University, 2003.    -   Sherrick, C. E.; Cholewiak, R. W.; Collins, A. A. The        Localization of Low- and High-Frequency Vibrotactile Stimuli.        Journal of the Acoustical Society of America 1990, 88 (1),        169-179.    -   Verrillo, R. T. Vibrotactile Thresholds for Hairy Skin. Journal        of Experimental Psychology 1966, 72 (1), 47-50.    -   Zhu, B; Skin-Inspired Haptic Memory Arrays with an Electrically        Reconfigurable Architecture; 2015.    -   Shih; Dubrowski; Carnahan; Evidence for Haptic Memory; 2009.    -   van Erp, J. B. F. Tactile displays for navigation and        orientation: perception and behavior (pp. 26-27), Soesterberg,        The Netherlands: TNO Human Factors, 2007.    -   Myles; Binseel; The Tactile Modality: A Review of Tactile        Sensitivity and Human Tactile Interfaces; ARL-TR-4115 report;        2007.

An eighth publication by Weinstein was unable to be located, yet much ofits contents were cited within this publication by Miles and Binseel.Also additional publications were not obtained, yet mentioned and citedwithin this publication by Myles and Binseel. The citations forWeinstein and the additional other publications in the References listedby Miles and Binseel were:

-   -   Weinstein, S. Intensive and Extensive Aspects of Tactile        Sensitivity as a Function of Body Part, Sex, and Laterality.        In D. R. Kenshalo (Ed.), The Skin Senses (pp. 195-222).        Springfield, Ill.: Charles C. Thomas, 1968.    -   Weber, E. H. The Sense of Touch (De Tactu. H. E. Ross and Der        Tastsinn, D. J. Murray, Trans.): New York: Academic Press, 1978        (original works published in 1834).    -   Sherrick, C. E.; Cholewiak, R. W. Cutaneous Sensitivity. In K.        Boff, L. Kaufman, & J. L. Thomas (Eds.), Handbook of Perception        and Human Performance, pp. 12-1-12-58. New York: Wiley, 1986.    -   Kandel, E. R.; Jessell, T. M. Touch. In E. R. Kandel, J. H.        Schwartz, T. M. Jessell (Eds.), Principles of Neural Science,        3rd ed. (pp. 349-414). New York: Oxford University Press, 1991.    -   van Erp, J. B. F.; van den Dobbelsteen, J. J. On the Design of        Tactile Displays; TNO-report TM-98-B012; Soesterberg, The        Netherlands: TNO Human Factors Research Institute, 1998.

The below data reproduced in Table 1 is read from the 2007 publicationby Kimberly Myles and Mary S. Binseel of the Army Research Laboratoryentitled “The Tactile Modality: A Review of Tactile Sensitivity andHuman Tactile Interfaces” which cited Weinstein. The graph associated inthe upcoming FIG. 61 of the instant patent disclosure is also taken fromthis same publication. The below numbers are approximations read fromthe graph associated since the graph did not have hard numbersassociated with each measurement. The tactile distance between pressurepoints for two-point discrimination is summarized in Table 1:

TABLE 1 Skin Tactile Distance Body Part in millimeters (mm) toe 10 foot21 leg 47 thigh 44 belly 35 back 39 breast 32 upper lip 5 cheek 7 nose 8forehead 15 forearm 38 shoulder 38 upper arm 46 palm 11 finger 1

A graphical representation of the data represented in Table 1 will beprovided in FIG. 61.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “F” references a fulcrum when the inside of a user's forearm        presses against a body leverage surface 495 relative to a grip        395 of an elongated handle 315 and pressing the blade end 325 of        an elongated handle 315 towards the torso backside of the user;    -   “T” references a skin convex inside a blade group 265;    -   “U” references a skin convex inside a support 275 taking form of        a blade group; and    -   “CC” references a skin convex inside a blade group 265 and a        support 275.

FIG. 29 illustrates a close up side view of the elongated handle and thesafety razor 105 for two-point discrimination previously circled in theprior illustration in FIG. 27 and the safety razor 105 removablyattaching to the elongated handle 315. The elongated handle 315 havingthe handle clip 365 allowing a user to press in order to allow thesafety razor 105 to removably attach or detach from the elongated handle315. The safety razor 105 having the blade group 265 and support 275according to embodiments of the present inventions. A substratestructure 215 adapted to hold both the blade group 265 and the support275 the on a front surface 375 of the substrate structure 215 with theblade group 265 and the support 275 spaced a tactile discriminationdistance 285 sufficiently wide enough to achieve two-pointdiscrimination tactile feedback felt through a torso region of the skinof the user perceived between the blade group 265 and the support 275and wherein the substrate structure 215 is adapted such that no elementswithin the tactile distance produce a tactile sensation on the skinsurface A. The support 275 comprises another blade group comprisinganother sharp blade 115 and another guard 135 parallel to the anothersharp blade 115. In FIG. 29 the support 275 takes the form a blade groupand each blade group comprising a sharp blade 115 with a sharp edge 125and an inner guard 135 parallel to the sharp blade 115 on a trailingside of the sharp blade 115 opposite an outer comb 145 having an insideedge 195 wherein the outer comb 145 parallel to the sharp blade 115 on aleading side of the sharp blade 115 and a substrate structure 215adapted to hold the blade group 265 and the support 275 on a frontsurface 375 of the substrate structure 215 with the blade group 265 andsupport 275 spaced a distance sufficient to achieve two-pointdiscrimination on the skin of a user between the blade group 265 andsupport 275. The front surface 375 of the substrate structure 215opposite a rear surface 385. Inner guard 135 having an outer edge 185and a trailing opening J inside of the outer edge 185 and the sharp edge125 of the sharp blade 115. Though the blade group 265, in FIG. 29, ispressing into the skin surface A the support 275 is not pressing intothe skin surface A and thus, the leading opening G inside of the insideedge 195 and the sharp edge 125 is still present. Depending on howflexible the sharp blade 115 is allowed the leading opening G is able toremain present or may no longer be present when the sharp blade 115moves closer to the inside of the outer comb 145. Blade group 265 issafely poking the skin surface A and creating a skin convex inside of anouter edge 185 and an inside edge 195 which is referenced as skin convexT. Skin convex T will be even more clearly illustrated in the close upview in the upcoming illustration in FIG. 31.

The safety razor 105 for two point discrimination having the frontsurface 375, the rear surface 385, a top side 335, a bottom side 345wherein the top side 335 is opposite the bottom side 345 and the topside 335 is close to the blade end 325 of the elongated handle 315. Thesubstrate structure 215 adapted to hold the blade group 265 and thesupport 275 on the front surface 375 of the substrate structure 215 withthe blade group 265 and the support 275 spaced a distance sufficient toachieve two-point discrimination on the skin of a user between the bladegroup 265 and support 275 and said support 275 and blade group 265extend from the front surface 375 of the substrate structure 215 andhaving a height X which is the height inside of the tips of both theblade group 265 and the support 275 to the front surface 375 of thesubstrate structure 215. Height X is about 3.81 millimeters or more.Height X is sufficient to avoid loose skin of the user touching andrubbing the front surface 375 of the substrate structure 215 which wouldinterfere with a shaving stroke. Both the blade group 265 and thesupport 275 having a bottom side 605 and a top side 595 wherein thebottom side 605 is opposite the top side 595. In a preferred embodimentheight X is about 3.81 millimeters or more and wherein the substratestructure 215 holds the blade group 265 and the support 275 spaced adistance between about 35 millimeters. A midpoint H may be between about0-75 degrees in relation to the front surface 375 of the substratestructure 215. A preferred angle of the tip of the blade group 265 orthe top side 595 of a blade group 265 in relation to the front surface375 of the substrate structure 215 is about 20 degrees. In FIG. 29 thesafety razor 105 for two-point discrimination is shown prior to gougingand indenting into the skin surface A while the opposite side view ofthis embodiment being identical according to a first embodiment of thepresent inventions.

The front surface 375 of the substrate structure 215 comprising one ormore grooves parallel from each other and adapted to removably hold theblade group 265 and support 275. In FIG. 29 a first groove 305 andsecondary groove 675 are illustrated. First groove 305 is removablyholding blade group 265 while the secondary grove 675 is removablyholding the support 275. The first groove 305 and secondary groove 675allow a user an option to choose a distance between the blade group 265and the support 275. The safety razor 105 also having a rear surface 385comprising a handle attachment 295 which is removably attaching to theelongated handle 315. It is preferred that the substrate structure 215removably adapts at least one blade group 265 at an angle of about 0-75degrees in relation to the front surface 375 of said substrate structure215. The blade group 265 in my invention is capable of successfullystroking skin and shaving hair when the midpoint H of a non-flexingportion of the sharp blade 115 is at about 75 degrees or less inrelation to the front surface 375 of said substrate structure 215.

The support 275 may take the form of a blade group or an alternativeembodiment having a least one blunt protrusion sufficient for safelypoking into the skin surface A. The support 275 may comprises more thanone blunt protrusion wherein each blunt protrusion may be at staggeredlocations.

A tactile discrimination distance 285 is a gap spaced inside of theblade group 265 and the support 275 and is about 35 millimeters orlarger for the torso. The back side human skin surface is among theleast sensitive portions of the human body and needs a longer tactilediscrimination distance 285 of about 39 millimeters. These 35 millimeterand 39 millimeter tactile discrimination distances are derived from thedata cited in Myles and Binseel, 2007 referencing Weinstein, 1968. Thetactile discrimination distance 285 may have an elevational gap EE whichmay be a deep or shallow gap inside of the tips of the blade group 265and the support 275 and the front surface 375. The tactilediscrimination distance 285 between a least the blade group 265 and thesupport 275 may vary. The tactile discrimination distance 285 allowsbalance and stability of the substrate structure 215 and safety razor105 when stroking against the skin surface A. Tactile discriminationdistance 285 also grants space for a tightened skin to convex and enterinside of the tactile discrimination distance 285 without rubbingagainst the front surface of substrate structure while allowing a userto maintain an effective angle between the blade group 265 and a skinsurface without difficulty. In order for the safety razor 105 to hoverover hills and valleys which may be found on the torso or back side of auser it is useful to have an elevational gap EE. In FIG. 29 theelevational gap EE is allowing room for the skin to move inside andbegin to convex without touching or rubbing against the front surface ofsubstrate structure. It will be illustrated in the upcoming FIG. 10 theskin convex taking full shape inside the elevational gap EE. Theelevational gap EE allows the skin to tighten inside of the blade group265 and support 275 creating a stabilized substrate structure 215. Thetactile discrimination distance 285 also creates an effective amount ofdistance between the blade group 265 and the support 275 in order toallow two-point discrimination to occur which will be further describedin the upcoming FIGS. 32-33. The tactile discrimination distance 285 isinside of the blade group 265 and support 275 and the elevational gap EEis illustrated with dashed lines inside the support 275 and blade group265.

In FIG. 29 the safety razor 105 for two-point discrimination isillustrated attaching the blade group 265 and a support 275, which inFIG. 29 takes the shape of a blade group. In FIG. 29 the blade group 265is poking and indenting into a skin surface A while the opposite sideview of this embodiment being identical according to a first embodimentof the present inventions. This illustration in FIG. 29 shows the bladegroup 265 creating the first point of the two points in two-pointdiscrimination represented by an initial sensory point signal 245.Initial sensory point signal 245 is a sensory in the human sensorysystem that is being triggered by the blunt tip of the blade group 265poking the skin surface A and letting a user understand the location ofthe blade group 265. The blade group 265 in my invention functionsproperly and is highly dependent on safely poking into the skin surfaceA in order to create indentations that allow a skin convex to forminside of the inner guard 135 and outer comb 145. It can be seen in FIG.29 the sharp blade 115 belonging to the blade group 265 is now flexing.The sharp blade 115 may flex very little or may be very flexibledepending on the location of the base in relation to the sharp edge 125of the sharp blade 115. The base was previously illustrated as base 205in the prior FIG. 26. The angle of a top side 595 of the blade group 265or the midpoint H in relation to the front surface 375 of a substratestructure 215 area is about between 0-75 degrees. A preferred angle of atip or the top side 595 of the blade group 265 in relation to the frontsurface 375 of the substrate structure 215 is 20 degrees. The midpoint Sreferences the flexing midpoint of the sharp blade 115 belonging to theblade group 265 or the support 275 when support 275 takes the form of ablade group. Midpoint H and midpoint S are both illustrated to show thedifference between when a portion of the sharp blade 115 is flexing andwhat it is not flexing. A cutting surface inside of the inner guard 135and the outer comb 145 is referenced as a convex surface Z. The anglebetween a midpoint S in relation to the angle of the convex surface Z isreferenced as angle R. Convex surface Z is illustrated with a dashedline extending out from the skin convex T in order to illustrate theangle representation. Angle R is about 35 degrees or less. A supplenessdistance is measured between the inside edge 195 of the outer comb 145and the outer edge 185 of the inner guard 135 of the blade group 265.The suppleness distance is narrower than tactile discrimination distance285 spaced between the blade group 265 and support 275, which saidsupport 275 is a blade group in FIG. 29. There is a relationship betweenthe tactile discrimination distance 285 and the distance of height X aspresented herein. It is helpful to prevent the front surface 375 of thesubstrate structure 215 from rubbing against the skin surface A during ashaving stroke. That being said, the greater the tactile discriminationdistance 285 the greater the dimension of height X. Just the same, whenthe lesser the tactile discrimination distance 285 the lesser thedimension of height X.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “S” references a midpoint portion of a flexing sharp blade;    -   “Z” references a convex cutting surface; and    -   “R” references an angle between midpoint S and cutting surface        Z.

FIG. 30 illustrates a close up side view of the elongated handle 315 andthe safety razor 105 for two-point discrimination previously circled inthe prior illustration in FIG. 28 and removably attaching to anelongated handle 315. The elongated handle 315 having a handle clip 365allowing a user to press in order to allow the safety razor 105 toremovably attach or detach from the elongated handle 315. The safetyrazor 105 having a blade group 265 and a support 275 according toembodiments of the present inventions. A substrate structure 215 adaptedto hold both the blade group 265 and the support 275 the on a frontsurface 375 of the substrate structure 215 with the blade group 265 andthe support 275 spaced a tactile discrimination distance 285sufficiently wide enough to achieve two-point discrimination tactilefeedback felt through a torso region of the skin of the user perceivedbetween the blade group 265 and the support 275 and wherein thesubstrate structure 215 is adapted such that no elements within thetactile distance produce a tactile sensation on the skin surface A.Another reason why the skin convex CC should not touch or rub the frontsurface 375 of the substrate structure 215, as illustrated in the oneembodiment of FIG. 30, is to avoid creating a tactile sensation on theskin and disrupting tactile discrimination, either or both two-pointdiscrimination and tactile leverage feedback. It should be noted thatwhen discussing the torso the breast tissue is not considered part ofthe torso. The support 275 in FIG. 30 takes the form a blade group andboth support 275 and the blade group 265 comprising a sharp blade 115with a sharp edge 125 and an inner guard 135 parallel to the sharp blade115 on a trailing side of the sharp blade 115 opposite the outer comb145 wherein the outer comb 145 parallel to the sharp blade 115 on aleading side of the sharp blade 115. A suppleness distance is measuredbetween the inside edge 195 of the outer comb 145 and the outer edge 185of the inner guard 135 of the blade group 265. The suppleness distanceis narrower than tactile discrimination distance 285 spaced between theblade group 265 and support 275, which said support 275 is a blade groupin FIG. 30.

A substrate structure 215 adapted to hold the blade group 265 and thesupport 275 on the front surface 375 of the substrate structure 215opposite the rear surface 385 with the blade group 265 and support 275spaced with a tactile discrimination distance 285 distance sufficient toachieve two-point discrimination on the skin of a user between the bladegroup 265 and support 275. Inner guard 135 having an outer edge 185 anda trailing opening J inside of the outer edge 185 and the sharp edge 125of the sharp blade 115. Outer comb 145 having an inside edge 195. InFIG. 30 a support 275 comprises another blade group comprising anothersharp blade 115 and another guard 135 parallel to the another sharpblade 115.

In FIG. 30 the blade group 265 and support 275 are both safely poking askin surface A and the blade group 265 is creating a skin convex Tinside of the outer edge 185 and the inside edge 195. The skin convexinside a blade group 265 is referenced as skin convex T while the skinconvex inside the support 275, which in FIG. 30 takes the form of ablade group, is referenced as skin convex U. The safety razor 105 havinga top side 335 and a bottom side 345 wherein the top side 335 isopposite the bottom side 345. The top side 335 of the safety razor 105is on the blade end 325 of the elongated handle 315. The blade group 265and the support 275 also having a top side 595 and a bottom side 605wherein the top side 595 is opposite the bottom side 605.

The front surface 375 of the substrate structure 215 comprising one ormore grooves parallel from each other and adapted to removably hold atleast one or more blade group 265 and support 275. In FIG. 30 a firstgroove 305 and a secondary groove 675 are illustrated. The first groove305 is removably holding blade group 265 while the secondary grove 675is removably holding the support 275. It is preferred that a substratestructure 215 adapts the blade group 265 at an angle of about 75 degreesor less in relation to the front surface 375 of said substrate structure215.

Grooves allow a user an option to choose a distance between the bladegroup 265 and support 275. The substrate structure 215 also having arear surface 385 comprising a handle attachment 295 for removablyattaching to the elongated handle 315. Handle attachment 295 may alsotake the form of an alternative method of attaching the safety razor 105for tactile feedback. For example, instead of the handle attachment 295being a protrusion that protrudes from the rear surface 385 in anotherembodiment a handle attachment 295 may be embodied as a female slot thatinterlocks with the long handle 315. Other alternative embodiments mayexist as well in order to attach the safety razor 105 with the elongatedhandle 315.

The support 275, as seen here in FIG. 30 may take the form of a bladegroup or in an alternative embodiment having a least one bluntprotrusion sufficient for safely poking into a skin surface. The support275 may comprises more than one blunt protrusion but instead may havemultiple blunt protrusions that are at staggered locations. A clip 175attaching a blade group 265 and attaching a support 275 to a substratestructure 215.

A tactile leverage feedback distance 286 is between the blade group andthe support is the distance measured from the forward most leading edgeand the reward most trailing edge of the blade group and the support. Anexample illustration of the tactile leverage feedback distance 286between the leading edge 195 of a leading blade group 265 and thetrailing edge 185 of an adjacent trailing blade group 275 as a supportwill be illustrated in the upcoming FIGS. 29 and 30.

A tactile discrimination distance 285 is between an adjacent blade groupand support is the distance measured from the trailing edge and theleading edge of the adjacent blade group and support. An exampleillustration of the tactile discrimination distance 285 between thetrailing edge 185 of a leading blade group 265 and the leading edge 195of an adjacent trailing blade group 275 as a support will be illustratedin the upcoming FIGS. 29 and 30. The tactile discrimination distance 285is a gap spaced inside of two supports and is about 35 millimeters. Thetactile discrimination distance 285 may be a two-point discriminationdistance as in FIG. 30. The tactile discrimination distance 285 may havean elevational gap EE which may be a deep or shallow gap inside of thetips of the blade group 265 and the support 275 and the front surface375. The tactile discrimination distance 285 between a least the bladegroup 265 and the support 275 may vary. The tactile discriminationdistance 285 allows balance and stability of the substrate structure 215and safety razor 105 when stroking against the skin surface A. Tactilediscrimination distance 285 also grants space for a tightened skin toconvex and enter inside of the tactile discrimination distance 285without rubbing against the front surface 375 of substrate structure 215while allowing a user to maintain an effective angle between the bladegroup 265 and a skin surface without difficulty. The tactilediscrimination distance 285 also creates an effective amount of distancebetween the blade group 265 and the support 275 in order to allowtactile feedback to occur which will be further described in theupcoming FIGS. 32-33. The tactile discrimination distance 285 is insideof blade group 265 and support 275 and the elevational gap EE isillustrated with dashed lines inside the support 275 and blade group265.

In order for the safety razor 105 to hover over hills and valleys whichmay be found on the torso or back side of a user it is useful to have aheight or elevational gap EE. The blade group and the support eachextend from the front surface of the substrate structure at a heightsufficient to avoid loose skin of the user touching the front surface ofthe substrate structure within the distance spaced between the bladegroup and the substrate structure. An adequate height or elevational gapEE prevents skin from rubbing against or touching the front surface 375of the substrate structure 215. In FIG. 30 the elevational gap EE allowsroom for the skin convex CC to completely enter inside the elevationalgap EE. In FIG. 30 the skin convex CC is taking full shape inside theelevational gap EE and the skin convex CC is not touching the frontsurface 375 of the substrate structure 215. If the skin convex CC wasrubbing against the front surface 375 of the substrate structure 215then the skin convex CC would not tighten and would not allow thesubstrate structure 215 to stabilize itself. Furthermore, if the skinsurface is rubbing against the front surface 375 of the substratestructure 215 the skin would interfere with the shaving stroke whenshaving over hills or valleys.

The height from tips of each of the blade group 265 and the support 275to the front surface 375 of a substrate structure 215 is referenced asheight X and is about 3.81 millimeters or more to avoid the loose skinof the user touching the front surface 375 of the substrate structure215.

In FIG. 30 the blade group 265 and the support 275 are both poking andindenting into the skin surface A while the opposite side view of thisembodiment being identical according to a first embodiment of thepresent inventions. This illustration in FIG. 30 shows both of the twopoints being made to carry out two-point discrimination and the user maynow understand the location of both the blade group 265 and the support275. The blade group 265 in my invention functions properly and ishighly dependent on safely poking into the skin surface A in order tocreate indentations that allow a skin convex to form inside of innerguard 135 and outer comb 145. It can be seen in FIG. 30 the sharp blade115 belonging to the support 275 is now flexing along with the sharpblade 115 belonging to the blade group 265. The preferred angle of thetop side 595 of the blade group 265 in relation to the front surface 375of the substrate structure 215 area is about between 0-75 degrees. Apreferred angle of a tip or the top side 595 of the blade group 265 inrelation to the front surface 375 of the substrate structure 215 is 20degrees. The midpoint S references the flexing midpoint of sharp blade115 belonging to blade group 265 or a support 275 taking the form of ablade group. Midpoint H and midpoint S are both illustrated to show thedifference between when the sharp blade 115 is not flexing and when itis flexing with midpoint S. A cutting surface inside of the inner guard135 and the outer comb 145 belonging to the support 275 and the bladegroup 265 is referenced as a convex surface Z. The angle between amidpoint S and the convex surface Z is referenced as angle R. Convexsurface Z is illustrated with a dashed line extending out from the skinconvex T in order to illustrate the angle representation. Angle R isabout 35 degrees or less. Midpoint H may be at about 0-75 degrees inrelation to the front surface 375. It is easy for a user to accomplish ashave with such a wide range of angles when stroking the safety razor105 to shave. Since shaving your backside or other areas of the bodythat are hard to see can be difficult to get a good shaving angle thisis a very helpful feature.

In FIG. 30 the tactile discrimination distance 285 is inside of sensorypoint signal 245 and a secondary sensory point signal 255. Sensory pointsignal 245 represents the initial sensory point signal 245 and secondarysensory point signal 255 represents the secondary sensory point signal255 being triggered through the sensory system and communicating to auser's brain the location of the sensory point signal 245 and thelocation of the secondary sensory point signal 255 with regards to the2-point discrimination. It is illustrated with a stream of star shapesrepresenting the triggered signal. Furthermore, it can be seen in FIG.30 that the skin surface plane A is now forming inside of the tactilediscrimination distance 285 and there is now a skin convex CC that hasformed inside the tactile discrimination distance 285. The tactilediscrimination distance 285 is the tactile distance or the distance. Itcan be seen that the blade group 265 extending from the front surface375 of the substrate structure 215 at a height X sufficient to avoid theloose skin of skin convex CC from touching and rubbing the front surface375 which would interfere with a shaving stroke. It should be noted thata portion of the blade group 265 is circled. The area circled will beillustrated as a close up view in the upcoming FIG. 31. There is arelationship between the tactile discrimination distance 285 and thedistance of height X as presented herein. It is helpful to prevent thefront surface 375 of the substrate structure 215 from rubbing againstthe skin surface A during a shaving stroke. That being said, the greaterthe tactile discrimination distance 285 the greater the dimension ofheight X. Just the same, when the lesser the tactile discriminationdistance 285 the lesser the dimension of height X.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “CC” references a convex skin surface contour A engaged in a        convex contour inside a blade group 265 and a support 275.

FIG. 31 illustrates a close up cross-sectional view of a portion of ablade group 265 circled in the prior FIG. 30 according to embodiments ofthe present inventions. The blade group 265 comprising at least a sharpblade 115 comprising a sharp edge 125 facing towards a skin surface Aand an outer comb 145 having an inside edge 195, an outer wall 155 ofouter comb 145, an outer comb inside wall 645 and an inner guard 135comprising an inner guard outer edge 185 and an inner guard inside end235. Inner guard inside end 235 is embodied where the inner guard 135and the sharp blade 115 meet. An inside portion of the outer comb 145removed in order to create a deep void 165. The sharp blade 115 isfixedly anchored on a sharp blade end 225 opposite the sharp edge 125. Adeep void 165 having a thickness which is represented as K allowing alevel of control over the flexibility of the sharp blade 115 as well asover-exposure of the sharp blade 115 in relation to the skin surface A.Thickness K of deep void 165 is about 0.381 millimeters or less. In apreferred embodiment distance K is about 0.381 millimeters. Thickness Kmay run thicker but the danger of cutting becomes increasingly probable.It should be understood that the outer comb inside wall 645 is measuredinside of the inside edge 195 and the sharp edge 125 of the sharp blade115 and said outer comb inside wall 645 creates a barrier for the skinsurface convex T. The deep void 165 is spaced intermediately of theouter comb 145 and the sharp blade 115. The level of distance of thedeep void 165 between a base 205 and the sharp edge 125 of the sharpblade 115 is referenced as L. The distance of L is about 4.572millimeters or less. A preferred distance of L is about 2.032 Although Lmay be less or greater than the preferred distance if the distancebecomes much less than 2.032 then the sharp blade 115 may run the riskof becoming too rigid and less able to bend and the sharp blade 115 maybecome more of a dagger which can be dangerous. If the distance of Lbecomes much greater than 4.572 millimeters then the sharp blade 115will start to bend too much and the sharp edge 125 of the sharp blade115 may move too far inside the outer edge 185 and inside edge 195 andwill run the danger of not cutting effectively. It can be seen in FIG.31 the midpoint S references the midpoint of the flexing sharp blade115. A skin convex T inside of the outer comb 145 and the inner guard135 has a cutting referenced as a convex surface Z. The angle betweenthe midpoint S and the convex surface Z is referenced as angle R. Convexsurface Z is illustrated with a dashed line extending out from the skinconvex T in order to illustrate the angle representation. Angle R isabout 35 degrees or less.

In FIG. 31 the cross-section of the blade group 265 is illustratedpressing into skin according to embodiments of the present inventions.The blade group 265 is safely poking or indenting into the skin surfaceA in order for the blade group 265 to dry shave hairs properly as wellas to create tactile feedback within the practice of two-pointdiscrimination. The sharp edge 125 of the sharp blade 115 longitudinallybends relatively more parallel to a skin surface A when the inside edge195 and the inner guard outer edge 185 safely poke into the skin surfaceA during shaving of hair. It can be seen from FIG. 31 that the hair 415,the Pacinian Corpuscle 425 and the Ruffini's Corpuscle 435 are now allactively being triggered due to the skin stretching and pressure fromthe inner guard 135 and the outer comb 145 into the skin surface A andforming the tightening skin convex T in order to exposure the base of ahair 415. Pacinian corpuscles 425, also known as the Lamellarcorpuscles, are one of the four major types of mechanoreceptor. They arenerve endings in the skin found in the subcutaneous layer of skin andare responsible for sensitivity to vibration and pressure. They respondonly to sudden disturbances and are especially sensitive to vibration.Feelings of deep pressure from a poke, for instance are generated fromPacinian corpuscles 425 which are located deeper in the dermis 455. Inmy invention the outer comb 145 and inner guard 135 serve to poke theskin surface A creating skin surface indentations and since the Paciniancorpuscles 425 are located deep in the dermis 455 it would be difficultfor a safety razor that did not create a significant poke or indentationto stimulate the Pacinian corpuscles 425. By taking full advantage ofcommunicating with the Pacinian corpuscles my invention is utilizingthis communication in the same way this communication is used intwo-point discrimination. Most safety razors found in most markets aredesigned to glide across the skin surface and are not designed to pokeinto the skin surface in order to trigger these nerves. The RuffiniCorpuscle 435, also known as the Ruffini's ending, is a slowlymechanoceptors found in the subcutaneous tissue layer and are anotherreceptor responsible for mechanoreception. This spindle-shaped receptoris sensitive to skin stretch, responds to sustained pressure, and islocated in the deep layers of the skin. As seen in FIG. 31 the skinindentations being created from the inner guard 135 and the outer comb145 are stretching and poking the skin. Thus, communication through thesensory system to a user's brain is taking place in relation to thelocation of blade group 265.

It can be seen now in FIG. 31 a trailing opening J allows for asufficient opening or void for creating a tightening skin convex T andthe skin convex T entering between inner guard outer edge 185 and combinside edge 195.

A trailing opening J is illustrated as a dashed imaginary triangleinside of the outer edge 185 of the inner guard 135 and the sharp edge125 of the sharp blade 115. In other alternate embodiments the dashedtriangle may be a right triangle or an isosceles triangle or anisosceles right triangle. In FIG. 31 an inner guard inside wall 665 isinside of the inner guard inside end 235 and the inner guard inside wall665 is one of three sides or walls of the imaginary dashed triangleillustrating the trailing opening J in FIG. 31. The second side of theimaginary triangle for trailing opening J starts from the inner guardinside end 235 and runs along the sharp blade 115 up to the sharp edge125 of the sharp blade 115. The third and final side starts from thesharp edge 125 of the sharp blade 115 and runs along the skin surfaceplane A when adjacent to the skin surface plane A area and up to theouter edge 185. These three sides work together to form the trailingopening J. The trailing opening J allows for a sufficient opening orspace for tightening skin to enter and convex and exposure the base orroot of a hair 415 in order to for the sharp blade 115 to cut a hair 415at the base of the hair very effectively which is illustrated here inFIG. 31. The trailing hairs illustrated in FIG. 31 are not shorn becausethe blade group 265 is merely pressing into the skin surface A and notperforming a shaving stroke. If the blade group 265 were moving forwardmaking a shaving stroke the hairs will become shorn. As seen in FIG. 31each of the outer teeth 145 are substantially perpendicular to the sharpedge 125 and it can be seen that the leading opening G, which wasillustrated in the second illustration in the prior FIG. 26, is nolonger illustrated since the sharp blade 115 has flexed enough to removethe opening G. However, in the case where the base 205 is closer to thesharp edge 125 of the sharp blade 115 the flexibility of the sharp blade115 may be greatly limited and the opening G may still exist. It can beseen in FIG. 31 the outer wall 155 of the outer comb 145 and the skinplane A create a one imaginary triangle with a vertex referenced asvertex O. Vertex O angle is created in order to allow the outer comb 145to better indent into the skin surface A allowing the blade group 265 toshave properly and for better two-point discrimination. In FIG. 31 itcan be seen that the vertex O vertices is allowing the inside edge 195of the outer comb 145 to safety indent into the skin in order to createa better skin convex T.

It can be seen in the illustration the tissue sub layers and the sensorswithin each layer which include the Epidermis 445, the Dermis 455 andthe Hypodermis 465. For the sake of clarity the sensors located in thedeep tissue sub layers are illustrated as being activated from the poke.The star shapes embodied on the strand of the sensor indicates thecommunication taking place. The illustrated sensors include theRuffini's Corpuscle 435, which are found in the Dermis 455 layer and thePacinian Corpuscle 425, which are found in the “subcutaneous” orhypodermis 465 layer. In FIG. 31 the star shapes represent sensors beingtriggered in the sensory system.

FIGS. 32-33 illustrate aerial views of a handles gripped by a userextended under the armpit towards the backside with two safety bladesindenting into the skin surface and triggering a sensory systemaccording to embodiments of the present inventions. In FIGS. 32-33 auser holds the elongated handle 315 removably attaching to a safetyrazor 105 wherein a grip 395 of the elongated handle 315 is respectivelygripped by fingers and hand by a same arm of the user the user isillustrated pressing a body leverage surface 495 located on an outerside 475 of the elongated handle 315 near a midway between the grip 395and a blade end 325, which is opposite a grip end 355, and configured topress the body leverage surface 495 against a user's forearm in order toleverage a handle attachment 295 located on an inner side 485 of theshaver handle 315 against a torso backside of the user and leveragingthe shaver handle 315 using the body leverage surface 495 to create afulcrum F relative to the grip 395 in order to press the blade end 325towards the torso backside of the user and stroking the blade end 325against the torso backside of the user. It should be noted that whendiscussing the torso the breast tissue is not considered part of thetorso. A substrate structure 215 operatively coupled to the blade end325 of the elongated back shaver handle 315, wherein the substratestructure 215 is adapted to hold both the blade group 265 and thesupport 275 on a front surface 375 of the substrate structure 215 withthe blade group 265 and the support 275 spaced a tactile leveragefeedback distance sufficiently wide enough to provide leverage feedbackfelt through the elongated back shaver handle 315 for the user tomaintain a consistent angle of the sharp blade relative to the skinsurface when an arm of the user reaches the elongated back shaver handle315 to a backside of the user during shaving movement over a shoulderblade peak or a spine depression on the backside. The user feelingwithin the hand of the user on the grip 395 of the elongated handle 315a leverage feedback from both the blade group 265 and the support 275against the backside skin.

The elongated handle 315 may have a generally s-shape and having asurface along a length of the elongated member 315. The elongated handle315 inner side 485 is opposite the outer side 475 and the elongatedhandle 315 also having a handle clip 365. A skin convex CC isillustrated inside of the blade group 265 and the support 275 and hasmoved inside of the elevational gap EE. Each of the different bladegroups may have different angles in relation to the substrate structure215. A suppleness distance is measured between the inside edge 195 ofthe outer comb 145 and the outer edge 185 of the inner guard 135 of theblade group 265. The suppleness distance is narrower than tactilediscrimination distance 285 spaced between the blade group 265 andsupport 275, which said support 275 is a blade group in FIGS. 32-33.

FIGS. 32-33 further illustrates star shaped figures dispatching from askin convex U created from a support 275 and a skin convex T createdfrom a blade group 265. These stars represent the sensors of which arebeing communicated through the sensory system as a result of initialsensory point signal 245 and secondary sensory point 255 being createdby the blade group 265 and the support 275 indenting into the skinsurface and signaling the sensors. The user feeling within nerves of theuser's skin a first tactile feedback at a first location where the bladegroup 265 presses against the user's skin and the user separatelyfeeling within nerves of the user's skin a second tactile feedback at asecond location where the support 275 presses against the user's skin. Auser may adjust a relative pressure of the pressing to seek equalpressure on the skin of the blade group 265 and the support 275 based onthe first tactile feedback and the second tactile feedback. In FIGS.23-33 the skin convex T is created by the blade group 265, while theskin convex U is created by the support 275. The sensory signals arecommunicating through the sensory system to the user's brain allowingthe user to understand that both the initial sensory point signal 245created by the blade group 265 as well as the secondary sensory pointsignal 255 created by the support 275 while both blade group 265 andsupport 275 indenting into the skin and allowing the user to understandthe location of blade group 265 and support 275. It can be seen thatwhen comparing FIG. 32 to FIG. 33 the safety razor 105 has made ashaving stroke across the back side. During this stroke it can be seenthat the sensors represented by the stars and referenced as initialsensory point signal 245 and secondary sensory point signal 255 havemoved from one location to another and during this transition the useris gaining the understanding of the old and new location of the safetyrazor 105 because of two-point discrimination. Also, although in FIG. 33the safety razor 105 has traveled across the skin surface in comparisonto FIG. 32, the sensory memory allows a user to temporarily still feelpreviously made impressions or indentations for a short period of timeallowing a user to understand where they have already just shaved orwhere they still may need to shave. This allows a user to refrain fromshaving in areas on the back that have already been shorn cuts down ontime and makes the process much more timely efficient. The elongatedhandle 315 has a straight distance measured directly from the blade end325 to the grip end 355 that is measured not following the curve of theelongated handle 315 which is about 330 mm to about 457.2 mm A preferredstraight distance of the back shaver handle 315 is about 355.6 mm.

The ability to discriminate stimuli on the skin also varies with wherethe skin is located on the body. Two-point discrimination is a measurethat represents how far apart two pressure points must be before theyare perceived as two distinct points on the skin (Gemperle et al.,2003). Weber's research focused on obtaining two-point discriminationthresholds for various areas of the body (Myles and Binseel, 2007references Weber 1834/1978). Using a metal compass, touched variousareas of the skin with the two points of the compass some distance apartand recorded judgments of the distance between the two points. (Mylesand Binseel, 2007 references Weber, 1834/1978). From his work,promulgated five general propositions, of which the first two statedthat (a) various parts of the touch organ are not equally sensitive tothe spatial separation of two simultaneous points of contact, (b) if twoobjects touch us simultaneously, we perceive their spatial separationmore distinctly if they are oriented along the transverse rather thanthe longitudinal axis of the body. (Myles and Binseel, 2007 referencesWeber, 1834/1978). This measurement will help the user to choose howdense his or her tactile array can be depending on what part of the bodythe tactile display is applied. (Myles and Binseel, 2007 referencesWeinstein, 1968) reported differences in two point discriminationthresholds for different areas of the body. Since each tip or tactor isresponsible for presenting a unique signal, if the blunt tips ortractors are placed too close together the user will perceive it as onesignal and will miss the sensory message being generated with the use oftwo signals. Weinstein's chart that better illustrates the thresholds oftwo-point discrimination in the upcoming FIG. 61.

From his work, (Myles and Binseel, 2007 references Weber, 1834/1978)promulgated five general propositions, of which the first two statedthat (a) various parts of the touch organ are not equally sensitive tothe spatial separation of two simultaneous points of contact, (b) if twoobjects touch us simultaneously, we perceive their spatial separationmore distinctly if they are oriented along the transverse rather thanthe longitudinal axis of the body. In order of decreasing sensitivityfor two-point discrimination, the tongue was found to be most sensitive,followed by the lips, fingers/palm, toes, and forehead. If tactors areplaced too close together and each tactor is responsible for presentinga unique signal in the scheme of some complex, tactile pattern, theobserver will perceive it as one signal and will miss the underlyingmessage generated with the use of two signals. Two-point discriminationacuity is less than 1 millimeters for the fingers, 15 millimeters forthe forehead, 35 millimeters for the forearm, 39 millimeters for theback, and 45 millimeters for the calf (Gemperle et al., 2003). Someareas of the body require are more sensitive that other areas of thebody and thus, require less distance between a pair of distinct points.

In general, sensitivity decreases as one moves from distal to proximalextremities (Sherrick, Cholewiak, & Collins, 1990) and skin impedance ofthe stimuli is different for different areas of the body (Myles andBinseel, 2007 references Sherrick & Cholewiak, 1986). All skin on thebody will probably follow some of the basic characteristics mentioned,but skin on different areas of the body will not be equally acutebecause of differences in skin “thickness, vascularity, density,electrical conductivity, and more derived properties, such as moduli ofshear and elasticity” (Myles and Binseel, 2007 references Sherrick &Cholewiak, 1986, p. 12-3; Weber, 1834/1978).

Similar to the relationship found for the visual and auditorymodalities, absolute threshold is inversely proportional to the amountof energy applied to the skin (Verrillo, 1966). Vibration is detectedbest on hairy, bony skin. (Gemperle et al., 2003). Since the four fibersoverlap in their absolute sensitivities, a vibration stimulus willseldom stimulate one fiber in the skin but several fibers because theenergy applied to the skin will move throughout nearby skin tissues(Myles and Binseel, 2007 references Sherrick & Cholewiak, 1986.) Withinthe vibrotactile literature, the fibers are grouped to describe twosystems: the Pacinian system and the non-Pacinian system. The Paciniansystem has a large receptive field excited by higher frequencies and thenon-Pacinian system consists of a small receptive field thought to beexcited by lower frequencies (Sherrick, Cholewiak, & Collins, 1990).(Sherrick et al., 1990) report perceptual sensations of the non-Paciniansystem as a superficial skin flutter while sensations for the Paciniansystem are described as deep and diffuse. For this reason, my safetyrazor 105 creates for a user effective communication in having multipleblunt tips that create multiple points of indentations at a distanceapart from each other which create deep impression or indentations intoa skin surface on a trunk or back side of a user.

Sensory memory is the process by which the human body retains thesensations of interaction with human body after the external stimuliceased, thus helping humans describe the physical quantities in theirenvironment and manipulate objects in daily activities. Skin, thelargest organ in the human body, has a variety of sensory receptors andprovides significant sensation information such as force, pain, shape,and texture. Skin perceives external stimuli and conveys the sensoryinformation to the brain through afferent neurons to form haptic memory,allowing humans to remember the impressions of the stimuli applied onthe skin (Zhu et al., 2015).

The term haptic memory can be defined as the ability to retainimpressions of haptically acquired information after the originalstimulus is absent (Shih, Dubrowski & Carnahan, 2009). After a series oftests were conducted it was concluded that haptic memory may last for upto 2 seconds. (Shih, Dubrowski & Carnahan, 2009). In embodiments of thepresent inventions the poking that my safety razor 105 creates against auser's torso stimulates the sensory memory of a user allows theinformation regarding the location of the safety razor 105 to beprocessed and retained if only for a short period of time. This allows auser to have a temporary understanding as to where the safety razor 105has already been stroking and still where the safety razor 105 needs tostill stroke.

As seen in FIGS. 32-33 after stroking the blade group 265 and a support275 against the skin surface a user may now have a temporaryunderstanding as to the location of where the blade group 265 andsupport 275 were traveling from and where the blade group 265 andsupport 275 are now presently location. This allows a user to, for abrief period of time, understand where both the blade group 265 andsupport 275 has just been and where the safety razor 105 is no longerpresent. This means that a user would be able to understand that theyhave been shaving in one area and may dictate where they need to stopand start based on a communication set forth with sensory memory.

According to (Myles and Binseel, 2007 references Kandel and Jessell,1991), Meissner's corpuscles and Merkel's cells respond to touch,Pacinian corpuscles respond to vibration, and Ruffini's corpusclesrespond to rapid indentation of the skin. Thus, a vibration stimulusdelivered to non-Pacinian fibers but designed to evoke responses typicalof Pacinian fibers (i.e., response to vibration) would produce lowerthreshold values than if the stimulus were directly delivered toPacinian fibers. Likewise, stimuli for glabrous and hairy skin must becreated to obtain the maximum sensitivity possible for each type ofskin. Compatibility between the stimulus and the skin structure to bestimulated will yield sensitivity values closer to true thresholdvalues. In the study conducted by Van Erp & Van den Dobbeltsteen (Mylesand Binseel, 2007 references an Erp & van den Dobbelsteen, 1998) theyconcluded that the Pacinian corpuscle and Ruffini's ending both havelarge receptive fields and respond to high levels of pressure vibrationand indenting into the skin. Van Erp & van den and Dobbelsteen concludedthat while the range of the Pacinian Corpuscle was 40 to 800 Hz, therange of the Ruffini's ending was 15 to 400 Hz. (Myles and Binseel, 2007references an van Erp & van den Dobbelsteen, 1998).

In embodiments there may be staggered supports 274 with blunt tips forindenting to cause tactile discrimination distance. A study waspreviously conducted and discussed by (van Erp, 2007) wherein 14 tactorswere placed in a horizontal array on the back with a spacing of 4millimeters, resulting in a center to center distance of 2 cm. Theresults show a uniform acuity across the torso of 3-4 cm, except forlocations on the body midline (i.e., the spine and the navel) forhorizontally oriented arrays (but not for the vertical arrays) where theresolution is much higher, about 1-2 cm. With a torso circumferencebetween 80-100 cm and a horizontal acuity of 3-4 cm, a horizontaldisplay resolution of 24 tactors should be obtainable. A similarcalculation would result in a vertical display resolution of 8 tactors.In addition to skin location, parameters of the vibrotactile signal canalso influence sensitivity to and the perception of tactile stimuli. Forexample, the tactile threshold for the trunk is 4 microns or lower butthis threshold may very well increase or decrease, depending on theinter-stimulus interval, amplitude, frequency, or location on the trunk.(van Erp, 2007)

One of the earliest and most well-known form of sensory substitutiondevices was Paul Bach-y-Rita's TVSS that converted the image from avideo camera into a tactile image and coupled it to the tactilereceptors on the back of his blind subject. In summary, the receptorswould create a tactile image on the back of the subject and the blindsubject could determine the image. Recently, several new systems havebeen developed that interface the tactile image to tactile receptors ondifferent areas of the body.

FIGS. 34-36 illustrate side views of a user utilizing an elongatedhandle 315 according to embodiments of the present inventions. Theelongated handle 315 removably attaching to a safety razor 105 for twopoint discrimination and said handle 315 having a blade end 325 and agrip end 355 and the blade end 325 opposite the grip 395 and the outerside 475 opposite the inner side 485, and between the outer side 475 andthe inner side 485. A handle clip 365 used to lock and release thesafety razor 105.

A body leverage surface 495 is located on the outer side 475 of theelongated handle 315 near a midway between the grip 395 and the bladeend 325 and the blade end 325 configured to press the body leveragesurface 495 against a user's forearm creating a fulcrum F when the grip395 is respectively gripped by fingers and hand by a same arm of theuser located on the inner side 485 of the elongated handle 315 and athumb of the hand facing away from the blade end 325 of the elongatedhandle 315 and the elongated handle 315 is reaching the blade end 325under an armpit of the same arm of the user to leverage the safety razor105 and handle attachment located on the inner side 485 of the elongatedhandle 315 against a torso backside of the user. It should be noted thatwhen discussing the torso the breast tissue is not considered part ofthe torso.

FIG. 37 illustrates a side view of a right attachment side 555 of ablade group 265 and blade group 265 comprising a sharp blade 115 with asharp edge 125 and an inner guard 135 parallel to the sharp blade 115 ona trailing side of the sharp blade 115 opposite the outer comb 145wherein an outer comb 145 parallel to the sharp blade 115 on a leadingside of the sharp blade 115 and an outer comb 145 comprising an insideedge 195 and an inner guard 135 comprising an inner guard outer edge185. A portion of the inner guard 135 inside of the outer edge 185 andthe sharp edge 125 of the sharp blade 115 is removed in order to createa trailing opening J. Trailing opening J allows for a sufficient openingor void for tightening skin to enter and convex in order for the sharpblade 115 to gain access to a base of a hair. Each of the outer teeth145 substantially perpendicular to the sharp edge 125 of the sharp blade115 and spaced with a leading opening G between the inside edge 195 ofthe outer teeth 145 and the sharp edge 125 of the sharp blade 115. Theright attachment side 555 having a clip 175 which is used to snap into agroove attachment of a substrate structure first or second groove. Theclip 175 may be on the right attachment side 555 or a left attachmentside which is opposite a right attachment side 555 of the blade group265 or support as will be further illustrated in the upcoming FIG. 58.In an alternative embodiment the clip 175 may be inside the leftattachment side and right attachment side 555 and near a bottom side 605which is opposite a top side 595 or may also be near a blade group frontsurface 615 which is opposite a blade group rear surface 625 of theblade group 265 or support.

In FIG. 37 the blade group 265 has an inner rearward distance BB fromthe sharp edge 125 of the flexible sharp blade 115 to the to the innerguard edge of the inner guard 135 in relation to an outer rearwarddistance N from the inside edge 195 of the outer comb 145 to the sharpedge 125 of the sharp blade 115 has a ratio of about 1. In other words,in this embodiment, the inner rearward distance BB and the outerrearward distance N are substantially the same. The inner rearwarddistance BB from the sharp edge 125 of the sharp blade 115 to the innerguard edge of the inner guard 135 is about 0.508 mm to about 1.016 mm Apreferred inner rearward distance BB from the sharp edge 125 of thesharp blade 115 to the inner guard 135 is about 0.762 mm. Also, theouter rearward distance N from the inside edge 195 of the outer comb 145to the sharp edge 125 of the sharp blade 115 is about 0.508 mm to about1.016 mm. A preferred outer rearward distance N from the inside edge 195to the sharp edge 125 is about 0.762 mm.

A thickness of the inner guard 135 from the outer edge 185 of the innerguard 135 to the nearest portion of the sharp blade 115 is referenced asdistance DD. Distance DD is about 0.381 mm to about 0.889 mm A preferreddistance DD is about 0.61 mm.

A deep void 165 running from a base 205 to the sharp edge 125. Athickness of the deep void 165 is referenced as thickness K. Thickness Kof the deep void 165 is about 0.7262 millimeters or less. In a preferredembodiment distance K is 0.0381 millimeters. The inner edge of the innerguard 135 and the inside edge 195 of the outer comb 145 in practice areblunt or curved edges because no corner is perfectly sharp or square. Ifthe inner edge of the inner guard 135 and the inside edge 195 of theouter comb 145 were perfectly sharp or square, they would risk cuttinginto the skin or feel uncomfortable. That being said, there may be aslightly square edge sufficient to indent and grip the skin in order forthe skin inside of the inside edge 195 and the inner guard 135 tostretch. These ends are the outermost horizontal dimension to the end ortip of the inner guard 135 or the outer comb 145. Therefore the innerrearward distance BB and outer rearward distance N are stated measuredfrom respective ends of the inner guard 135 and the outer comb 145.

The deep void 165 between the row of the outer comb 145 and the planarsurface of the sharp blade 115. The top side 595 is opposite the bottomside 605 and the right attachment side 555 of the blade group 265 closeto the bottom side 605. The blade group front surface 615 is oppositethe blade group rear surface 625 and the blade group front surface 615is facing against a skin surface during a shaving stroke. A height froma blunt tip of the blade group 265 to the lowest portion of the bladegroup rear surface 625 of the blade group 265 is referenced as height Vand is about 5.08 millimeters or more.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “BB” references a distance rearward from the sharp edge 125 of        the sharp blade 115 to the outer edge 185 of the inner guard 135        is referenced as distance BB;    -   “N” references a distance rearward from the inside edge 195 of        the outer comb 145 to the sharp edge 125 of the sharp blade 115        is referenced as distance N;    -   “DD” references a thickness of the inner guard 135 from the        outer edge 185 of the inner guard 135 to the nearest portion of        the sharp blade 115 is referenced as distance DD; and    -   “V” references a height from a blunt tip of the blade group 265        to the lowest portion of the blade group rear surface 625 of the        blade group 265 is referenced as height V.

FIG. 38 illustrates a diagram of the different muscles that are found onthe backside of the human body. It is important to take notice as tojust how many different muscles that are found on the backside and thedivides, which are illustrated as divide P are seen in FIG. 38 betweenthe muscles. The more defined the muscles on one's backside means themore muscles divides P are present which means the more of a challengethe shaving terrain may pose for most traditional safety razors found inmost markets. In the body building world an individual who has a highlevel of muscle definition is known as being “cut”. When an individualhas a high level of muscle definition it is common to see a defineddivide or a “cut” which looks like a valley between each muscle groupwhich can be seen in FIG. 38. In the upcoming FIGS. 39-44 it will bemore clearly illustrated as to how a safety razor 105 for two-pointdiscrimination performs a shaving stroke over challenging terrain withhills and valleys which can be found on the body and especially the backside of a user. It is because these areas are difficult to reach andshave properly that many individuals with muscles as such are forced tomaintain their back hair with other non-preferable and painful meanssuch as waxing and laser hair removal. It should be understood that thestrength and flexibility of skin comes from two structures found in thedermal layer of skin which are collagen and elastin. Together, collagenand elastin make up about 70% of the dermal layer. Collagen is a fibrousprotein that gives the skin form and strength. It holds together all thevarious structures of the skin and gives it plumpness and firmness.Elastin is a protein base interwoven with the collagen fibers to formelastic tissue. This gives the skin its flexibility and elasticity whichmy invention takes much advantage in using during the shaving process.Elastin helps the skin resume its shape after expanding or stretching.Muscle tissue is arrange in bundles of parallel fibers and is stretchy.Being that skin and muscle have these characteristics is very relevantin that while most traditional shavers are used to glide on the skinsurface my invention is purposely designed to indent into the skin andwhen moving across the skin.

Letter designations in the drawings depict certain planes, gap distancesand contours, defined throughout, and for convenience are summarilydefined wherein:

-   -   “P” illustrates a muscle divide inside of a pair of muscles        found on the human back side.

FIGS. 39-41 illustrate close up side views of a muscle divide P as wasillustrated in the previous FIG. 38 and showing a safety razor 105removably attaching to an elongated handle 315 according to embodimentsof the present inventions. The safety razor 105 having a front surface375, a rear surface 385, a top side 335, and a bottom side 345 whereinthe front surface 375 is opposite the rear surface 385 and the top side335 is opposite the bottom side 345 and a blade group 265 comprising asharp blade 115 with a sharp edge 125 and an inner guard 135 parallel tothe sharp blade 115 on a trailing side of the sharp blade 115 oppositean outer comb 145 wherein the outer comb 145 parallel to the sharp blade115 on a leading side of the sharp blade 115 and the outer comb 145comprising an inside edge 195 and an outer wall 155 of outer comb 145and the inner guard 135 comprising an inner guard outer edge 185. It canbe seen that the top side 335 is close to a blade end 325 of theelongated handle 315. A handle clip 365 is on the inner side 485 of theelongated handle 315. The elongated handle 315 having an inner side 485and an outer side 475 wherein the inner side 485 is opposite the outerside 475. In another embodiment the handle clip 365 may also be on theouter side 475 of the elongated handle 315. A portion of the inner guard135 inside of the outer edge 185 and sharp blade 115 is removed in orderto create a trailing opening J which a skin convex T enters as seen inFIGS. 39-41. Trailing opening J allows for a sufficient opening or spacefor tightening skin to enter and allow convex T to form and in order forthe sharp blade 115 to gain access to a base of a hair 415. Each of theouter teeth 145 substantially perpendicular to the sharp edge 125 of thesharp blade 115. A deep void 165 between the row of the outer comb 145and the planar surface of the sharp blade 115. When the sharp blade 115is flexed a void is inside the inner guard inside end 235 and the sharpblade 115. In FIGS. 39-41 the safety razor 105 is pressing into a skinsurface A having a muscular skin surface hill and how when safely pokingand gouging into the skin and moving forward to perform a shaving strokeit can also be seen that the while the inner guard 135 outer edge 185and the outer comb 145 inside edge 195 are gouging the skin surface Athey are creating a skin convex T while inside of the blade group 265and a support 275 a skin convex contour CC is inside of a elevationalgap EE and a tactile discrimination distance 285. The tactilediscrimination distance 285 inside the blade group 265 and support 275and the elevational gap EE creating sufficient space and allowing theblade group 265 and the support 275 to navigate the terrain withouthaving the skin convex CC rubbing against the front surface 375 of thesafety razor 105 which would cause a disruption in the shaving strokeprocess. A tactile discrimination distance 285 inside a blade group 265and support 275 allowing said blade group 265 and support 275 tonavigate the terrain without having a skin convex CC or a secondary skinconvex CC from rubbing against the front surface 375 of a safety razor105 which would cause a disruption in the shaving stroke process. Atactile discrimination distance 285 inside a blade group 265 and support275 allowing said blade group 265 and support 275 to navigate theterrain without having skin convex CC rubbing against the front surface375 of a safety razor 105 which would cause a disruption in the shavingstroke process. It is illustrated that as the safety razor 105 fortwo-point discrimination moves closer to the muscle divide P the hairs415 are being shorn. Initial sensory point signal 245 and secondarysensory point signal 255 are illustrated and are communicating through auser's sensory system and letting the user know the location of each ofthe two points.

It is illustrated that as the safety razor 105 for two-pointdiscrimination moves closer to the muscle divide P the hairs 415 arebeing shorn. Initial sensory point signal 245 representing the sensorycommunication taking place from the blade group 265 poking the skinwhile the secondary sensory point signal 255 representing the sensorycommunication taking place from the support 275 poking the skin. Bothinitial sensory point signal 245 and secondary sensory point signal 255are communicating through a user's sensory system and letting the userknow the location of each of the two points. It can be seen in FIGS.39-41 that a midpoint of a non-flexing portion of the sharp blade 115 isreferenced as midpoint H. The degree of angle between mid-point H inrelation to the skin surface A is referenced as angle M. Angle M mayrange from about 0-75 degrees. Since angle M may be at 0-75 degrees towork properly it can be seen this is very beneficial in making it easierfor a user to get an accurate shaving angle. It is preferred that M beat about a 20 degree angle. The angle between the front surface 375 thesafety razor 105 in relation to the midpoint H is referenced as angle Y.Angle Y is 0-75 degrees or less. A preferred angle of angle Y is about20 degrees. A handle attachment 295 is on the rear surface 385 of thesafety razor 105.

In FIGS. 39-41 a portion of the blade group 265 in each illustration iscircled referencing a close view of this circled area which will beillustrated in a close up view in the upcoming FIGS. 42-44. In FIG. 39angle M is at about 45 degrees. In FIG. 40 angle M is 50 degrees. InFIG. 41 angle M is 35 degrees which is illustrating how angle M is ableto perform at such a wide range of angle. Furthermore, the circledportion of the blade group 265 in FIG. 39 is illustrated in a close upview illustration in the upcoming FIG. 42. The circled portion of theblade group 265 in FIG. 40 is illustrated in a close up viewillustration in the upcoming FIG. 43. Finally, the circled portion ofthe blade group 265 in FIG. 41 is illustrated in a close up viewillustration in the upcoming FIG. 44.

It can be seen in FIG. 41 that when the muscles divide P is inside ofthe tactile discrimination distance 285 that the skin convex CC maysometimes exist between the muscles divide P and the support 275 orblade group 265. The tactile discrimination distance 285 inside theblade group 265 and support 275 allowing said blade group 265 andsupport 275 to navigate the terrain without having a skin convex CC or asecondary skin convex CC from rubbing against the front surface 375 ofthe safety razor 105 which would cause a disruption in the shavingstroke process.

In FIGS. 42-44 a blade group 265 has a blade group front surface 615opposite a blade group rear surface 625 along a skin plane A comprisinga sharp blade 115 and an inner guard 135 parallel to the sharp blade 115with a sharp edge 125 on a trailing side of the sharp blade 115 oppositean outer comb 145 wherein the outer comb 145 parallel to the sharp blade115 on a leading side of the sharp blade 115 and the outer comb 145comprising an inside edge 195 and an outer wall 155 of outer comb 145and the inner guard 135 comprising an inner guard outer edge 185 and aninner guard inside wall 665 which is a wall inside the outer edge 185and the inner guard inside end 235. A portion of the inner guard 135inside of the outer edge 185 and the sharp edge 125 of the sharp blade115 is removed in order to create a trailing opening J which a skinconvex T entering opening J as seen in FIGS. 42-44. The inner guard 135comprising the inner guard outer edge 185, an inner guard inside end 235and an inner guard inside wall 665 inside the outer edge 185 and theinner guard inside end 235. The trailing opening J allows for asufficient opening or space for the tightening skin convex T to enterand convex in order for the sharp blade 115 to gain access to a base ofa hair 415. Each of the outer teeth 145 substantially perpendicular tothe sharp edge 125 of the sharp blade 115. A deep void 165 between therow of the outer comb 145 and the planar surface of the sharp blade 115.When the sharp blade 115 is flexed a void is inside of the inner guardinside end 235 and the sharp blade 115 as see in FIG. 42-44.

FIGS. 42-44 illustrate close up side views of the circled portion of theblade group 265 previously illustrated and described in the prior FIGS.39-44, each at different angles M. In FIGS. 42-44 a degree of anglebetween a midpoint of a flexing portion of the sharp blade 115 isreferenced as flexing midpoint S and the angle of midpoint S and isillustrated with a dashed line. A cutting surface of skin convex T isreferenced as surface Z and illustrated with a dashed lined toillustrate the surface angle of surface Z. The preferred angle ofmidpoint S in relation to the surface Z is referenced as angle R. AngleR is preferred to have an angle of about 35 degrees or less. In theprevious FIGS. 39-41 we learned that angle M may range from about 20-75degrees. It can be seen in FIGS. 42-44 that despite the wider ranges ofangle M, angle R remains at an angle between 20-35 degrees. Theembodiments of FIGS. 39-44, when at 20 degrees for both M and R, assumethe non-flexing sharp blade 115 is not flexed. As the handle angle Mincreases, the sharp blade 115 flexes keeping its change of angle Rsmaller than the change of handle angle M. Meanwhile, in the embodimentsof FIGS. 42-44 the support 275 helps keeps the handle angle M within itsown range of 20-70 degrees. In summary, when the safety razor 105 isstroking over hills and valleys at various angles the quality of thepreferred angle R is not altered nor disturbed. This allows a user moreflexibility when shaving their back side, for example, and it is verydifficult for a user to not shave effectively. In FIGS. 42-44 it can beseen there are shorn hairs being cut near the leading side of the bladegroup 265.

FIGS. 45-46 illustrate side views of a safety razor 105 for two-pointdiscrimination removably attaching with an elongated handle 315 having ahandle clip 365 and along a skin plane A with a blade group 265 and asupport 275 and the elongated handle 315 having an inner side 485 and anouter side 475. The inner guard 135 can be shaped as a plate runningnext to and continuously alongside on a trailing side of the sharp blade115. The outer comb 145 can be shaped as a plate running next to andcontinuously alongside on a leading side of the sharp blade 115. In FIG.45-46 the support 275 takes the form a blade group and both support 275and blade group 265 comprising a sharp blade 115 with a sharp edge 125and an inner guard 135 parallel to the sharp blade 115 opposite an outercomb 145 wherein the outer comb 145 parallel to the sharp blade 115 on aleading side of the sharp blade 115 and a substrate structure 215adapted to hold the blade group 265 and the support 275 on a frontsurface 375 of the substrate structure 215 opposite a rear surface 385and the blade group 265 and support 275 spaced with a tactilediscrimination distance 285 allowing a distance sufficient to achievetwo-point discrimination on the skin of a user between the blade group265 and support 275. The safety razor 105 for two point discriminationhaving a top side 335 and a bottom side 345 wherein the top side 335 isopposite the bottom side 345. Inner guard 135 having an outer edge 185and a trailing opening J inside of the outer edge 185 and the sharp edge125 of the sharp blade 115. Outer comb 145 having an inside edge 195 anda leading opening G inside of the inside edge 195 and the sharp edge 125of the sharp blade 115. The trailing opening J is referred to a trailingopening since when the safety razor 105 is performing a shaving strokethe trailing opening J is always trailing the leading opening G.However, in FIG. 45 it can be seen that a top side 595 of the bladegroup 265 and the top side 595 of the support 275 are directed inopposite directions of one another. The top side 595 of the support 275is directed towards the top side 335 while the top side 595 of the bladegroup 265 is directed towards the bottom side 345 of the safety razor105. This means that when a user is holding the elongated handle 315 andpulling the safety razor 105 across their backside the blade group 265is shaving while the support 275 is not shaving. Just the opposite, thewhen user is holding the elongated handle 315 and is pushing the safetyrazor 105 across their backside the support is shaving while the bladegroup 265 is not shaving. This particular method is beneficial as theuser may save much time between shaving strokes.

In FIGS. 45-46 the substrate structure 215 adapted to hold the bladegroup 265 and the support 275 on the front surface 375 of the substratestructure 215 with the blade group 265 and the support 275 spaced adistance sufficient to achieve two-point discrimination on the skin of auser between the blade group 265 and the support 275. The support 275and blade group 265 extend from the front surface 375 of the substratestructure 215 at a height X sufficient to avoid loose skin of the usertouching and rubbing the front surface 375 of the substrate structure215 which would interfere with a shaving stroke. The height from tips ofeach of the blade group 265 and the support 275 to the front surface 375of the substrate structure 215 is referenced as height X and is about3.81 millimeters or more to avoid the loose skin of the user touchingthe front surface 375 of the substrate structure 215 and wherein thesubstrate structure 215 holds the blade group 265 and the support 275spaced a distance about 35 millimeters or more. The front surface 375 ofthe substrate structure 215 comprising one or more grooves parallel fromeach other and adapted to removably hold at least one blade group 265and support 275. Groove 305 and secondary groove 675 allow a user anoption to choose a distance between the blade group 265 and support 275.The rear surface 385 of the substrate structure 215 comprising a handleattachment 295. It is preferred that the substrate structure 215 adaptsthe blade group 265 at an angle of about 0-75 degrees in relation to thefront surface 375 of substrate structure 215. The support 275 may takethe form of a blade group or an alternative embodiment having a leastone blunt protrusion sufficient for safely poking into the skin surfaceA.

Tactile discrimination distance 285 is a gap spaced inside of at leastone blade group 265 and support 275. The tactile discrimination distance285 may have an elevation gap EE which may be deep or shallow and thedistance of the tactile discrimination distance 285 between a pair ofsupports may vary. The tactile discrimination distance 285 allowsbalance and stability of the substrate structure 215 when strokingagainst the skin surface A. Tactile discrimination distance 285 alsogrants space for a tightened skin to convex and enter inside of thetactile discrimination distance 285 without rubbing against the frontside of substrate structure 215 while allowing a user to maintain aneffective angle between the blade group 265 the skin surface A withoutdifficulty. The tactile discrimination distance 285 also creates aneffective amount of distance between the blade group 265 and the support275 in order to allow two-point discrimination to occur. The tactilediscrimination distance 285 is inside of the blade group 265 and support275 and the elevational gap EE is illustrated with dashed lines.Elevational gap EE allows a skin convex to enter when the safety razor105 is pressing into the skin surface A.

In the embodiment here in FIG. 45 the top side 595 of a blade group 265is directed towards the bottom side 345 of the substrate structure 215while the top side 595 of the support 275 is directed towards the topside 335 of the substrate structure 215 or safety razor 105. Thesearrangements may be altered in order to create alternate two pointdiscrimination distances for shaving alternate areas of the body whichwill be further illustrated in the upcoming FIGS. 46-47.

In FIG. 45 the blade group 265 and support represented as another bladegroup 275 each having a clip 175 for removably attaching to thesubstrate structure 215. The safety razor has a substrate structure 215according to the embodiment illustrated in FIG. 45 capable ofselectively adapting different blade groups 265 and 275, each of thedifferent blade groups 265 and 275 having different angles in relationto the substrate structure 215. The angles of the different blade groups265 can be opposite angles relative to the substrate structure 215, asillustrated. The angles can also be different form one another for atleast two blade groups 265 and 275 when three or more blade groups. Theopposite angle can be accommodated by a user merely inserting or slidingin one of the blade groups in an opposite direction from the other.Having a first and second blade group as illustrated in FIG. 45 allowsfor the safety razor 105 to shave hair when a user is both pulling andpushing the safety razor across the skin.

As seen in FIG. 46 the support 275, which is taking form of a secondaryblade group, has been turned a 185 degrees wherein the top side 595 ofthe support 275 is now facing the bottom side 345 of the safety razor105. In FIG. 46 it can be easily seen the tactile discriminationdistance 285 distance is much less in comparison to the prior FIG. 45between the blade group 265 and support 275 for two-pointdiscrimination. A user may now use the two point discrimination on anarea that requires less of a tactile discrimination distance 285distance in comparison to FIG. 45. Alternate embodiments or arrangementsof the blade group 265 and support 275 may exist to create alternatetactile discrimination distance 285 distances. Allowing a user theoption to create alternate tactile discrimination distance 285 distancesallows a user to apply two-point discrimination on alternate areas ofthe body since different areas on the body require different distancesbetween two points.

FIGS. 47-48 illustrate side views of an elongated handle 315 having ahandle clip 365 and said handle 315 is removably attaching to a safetyrazor 105 for two-point discrimination according to an embodiment havinga substrate structure 215 with a front surface 375, a rear surface 385,a top side 335, a bottom side 345, wherein the front surface 375 isopposite the rear surface 385 and the top side 335 is opposite thebottom side 345 and the rear surface 385 having a handle attachment 295and a first groove 305, and a secondary groove 675 and a third groove685 inside of said first groove 305 and said secondary groove 675wherein a third groove 685 allows the option to choose multiple tactilediscrimination distance 285 distances between at least one blade group265 and support 275 when carrying out two-point discrimination. In FIG.47 a support 275 taking form of an electrical trimmer 277. In caseswhere a user is extremely hairy it would prove beneficial to have thesupport 275 be an electrical trimmer 277 ran by a battery 655 or anelectrical power cord that would allow a user to trim back hair and bodyhair to a lesser level prior to applying the blade group 265. In thesame way it is common for a man to trim his beard prior to shaving withrazor designed to shave one's face it would also prove beneficial forthose who wish to trim their back or body hair prior to applying theblade group 265. The blade group 265 and support 275 having a clip 175for attaching to the substrate structure 215. A tactile discriminationdistance 285 is also illustrated inside the tip of the blade group 265and the support 275. Although a user may replace the blade group 265 asupport 275 in FIG. 47 takes the form of an electric trimmer 277. It ismore beneficial to have both the support 275 taking form of anelectrical trimmer 277 may lead when stroking the safety razor 105against a skin surface in order to first trim the hair down with theblade group 265 trailing the support 275 embodied as electric trimmer277 in order to then closely shave the trimmed hair that was trimmed bythe support 275 taking the form of an electric trimmer 277.

In FIG. 48 a support 275 takes the form of an interchangeablelubricating strip 278 according to an embodiment. In cases where a userwishes to wet shave or shave with the presence of water with a shavinglubrication it would be beneficial for a user to removably hold thesupport 275 taking form of an interchangeable lubricating strip. Aninterchangeable lubricating strip 278 is commonly used with safetyrazors designed for a user's face, however, it is not common to have aninterchangeable lubricating strip 278 functioning as the support 275 asseen in FIG. 48. Most safety razors found in most markets have alubricating strip 278 attached with a safety razor and both safety razorand lubricating strip 278 are disposable. The interchangeablelubricating strip 278 may also contain a solid or liquid soap substancefor lubrication. In my invention a user may choose to not dispose of thesubstrate structure 215 but rather dispose of the support 275 taking theform of an interchangeable lubricating strip 278.

FIGS. 49-50 illustrate front views of a safety razor 105 for two-pointdiscrimination having a top side 335, a bottom side 345, a safety razorleft side 505, a safety razor right side 515, wherein the top side 335is opposite the bottom side 345 and the safety razor left side 505 isopposite the safety razor right side 515. The safety razor 105 having afront surface 375 with a blade group 265 and a support 275 wherein theblade group 265 and support 275 are separated with a tactilediscrimination distance 285 at a distance sufficient for two-pointdiscrimination. A channel 975 is inside the blade group 265 and thesupport 275 allowing alternate distances between the blade group 265 andthe support 275. In FIGS. 49-50 the support 275 having a lock andrelease 965. However, in an alternate embodiment the blade group 265 maymove through the channel 975 as well. The blade group 265 having aninner guard 135, an outer comb 145 and a sharp blade 115. In FIGS. 49-50the support may comprise at least one blunt protrusion 276 for safelypoking into the skin surface A. Furthermore, the tip of the blade group265 may also have a blunt protrusion. The support 275 may comprises morethan one blunt protrusion 276 wherein each blunt protrusion 276 may beat staggered locations. In fact, there may be three blunt protrusions276 at staggered locations.

Finger depressions 405 are illustrated in FIGS. 49-50 along the bottomside 345 of the safety razor 105. The safety razor 105 may be removablydetached from the elongated handle in order for a user to grasp thesafety razor 105 and shave with said safety razor 105 againsteasy-to-reach areas such as the chest or shoulder area. The fingerdepressions 405 allow a user to more easily grasp the safety razor 105.The finger depressions 405 may, in an alternate embodiment, be on thetop side 335, the safety razor left side 505 or the safety razor rightside 515. In FIG. 50 a user's hand is illustrated with dashed lines inorder to illustrate how a user may press the support 275 or the lock andrelease 965 of the support 275 and may move the support 275 through thechannel 975 and closer to the blade group 265. Furthermore, it can beseen that the tactile discrimination distance 285 in FIG. 50 has becomea lesser distance in comparison to FIG. 49. In FIGS. 49-50 the channel975 stretches vertically from the top side 335 to the bottom side 345 ofthe safety razor 105 substrate structure 215. It can seen that in FIGS.49-50 an alternate embodiment is presented wherein the inner guard 135may be embodied as a comb inside of the outer comb 145. An inner guard135 with a comb may allow a user to have multiple edges on the innerguard 135 tip which may help indenting into the skin during shaving.Furthermore, when the inner guard 135 has a comb, the inner guard 135may better exfoliate and removing dead skin during the shaving processsince the inner guard 135 with a comb has multiple points on the innerguard 135 tip for dragging against the dead skin surface.

Having a channel 975 that is parallel with the front surface allows theheight X of both the blade group 265 and the support 275 to remainsomewhat equal. In another embodiment the channel 975 may be at an anglein relation to the front surface of the safety razor 105. This allowsthe height X of the blade group 265 to become different that the heightX of the support 275 which will be further illustrated in the upcomingFIGS. 51-52.

FIGS. 31-32 illustrate close up side views of a safety razor andelongated handle according to embodiments of the present inventions. Theelongated handle 315 has a handle clip 365 removably attaching to asafety razor 105 for two-point discrimination along a skin surface planeA and the safety razor 105 having a blade group 265 and a support 275according to an embodiment of the present inventions. The safety razor105 having a top side 335, a bottom side 345, a front surface 375, and arear surface 385, wherein the top side 335 is opposite the bottom side345 and the front surface 375 is opposite the rear surface 385. The rearsurface 385 having a handle attachment 295 for removably attaching to ablade attachment of the elongated handle 315. The safety razor 105having a substrate structure 215 for removably attaching the blade group265 and the support 275 wherein the blade group 265 and support 275 areseparated with a tactile discrimination distance 285 at a distancesufficient for two-point discrimination. The tactile discriminationdistance 285 having an elevational gap EE inside the tactilediscrimination distance 285 which may be deep or shallow. A height Xmeasured from the front surface 375 to the tips of the blade group 265or support 275. A channel 975 is inside the top side 335 and the bottomside 345 of the safety razor 105 and inside the front surface 375 andthe rear surface 385 and said channel 975 allowing alternate distancesfor two-point discrimination between the blade group 265 and the support275. In FIG. 51 the channel 975 is at an alternate angle in relation tothe front surface 375 of the substrate structure 215 or safety razor105. This allows multiple alternate angles between the midpoint H of theblade group 265 and support 275 in relation to the skin plane A. Forexample, in FIG. 51 the midpoint H in relation to the skin surface A is30 degrees while in FIG. 52 the midpoint H in relation to the skinsurface A is 40 degrees. Not only has the angle of the midpoint H inrelation to the skin surface A changed, when comparing FIG. 51 to FIG.52, but also in FIG. 52 the tactile discrimination distance 285 hasbecome lesser in distance when comparing to FIG. 51. Furthermore, it canbe seen that the height X between the front surface 375 and the tip ofthe support 275 is greater than the height X between the front surface375 and the tip of the blade group 265. In another alternate embodimentthe channel 975 may not be at an angle in relation to the front surface375 of the safety razor 105 but may be parallel with the front surface375. This allows the support 275 and blade group 265 to be allowedmultiple distances from each other without altering the angle betweenthe midpoint H and the skin surface A.

In FIGS. 51-52 the blade group 265 and support 275 embodied as a bladegroup comprising at least one sharp blade 115 comprising a sharp edge125 facing towards a skin surface A comprising an outer comb 145comprising an inside edge 195, an inner guard 135 comprising an innerguard outer edge 185. Both the blade group 265 and the support 275having bottom side 605 and a top side 595 where a midpoint H isembodied. A trailing opening J wherein the trailing opening J is insideof the outer edge 185 and the sharp edge 125 of the sharp blade 115. Aleading opening G wherein the leading opening G is inside of the insideedge 195 and the sharp edge 125 of the sharp blade 115. A portion of theinner guard 135 inside of the outer edge 185 and sharp edge 125 isremoved in order to create a trailing opening J inside of outer edge 185and a sharp edge 125 of a sharp blade.

FIGS. 53-55 illustrate a close up cross-sectional view of a blade group265 according to embodiments of the present inventions. A blade group265 comprising at least one sharp blade 115 comprising a sharp edge 125facing towards a skin surface A comprising an outer comb 145 comprisingan inside edge 195, an outer comb outer wall 155, and an outer combinside wall 645 on the inside of the outer comb 145 and inside of thesharp edge 125 and inside edge 195 and an inner guard 135 comprising aninner guard outer edge 185, an inner guard inside end 235 and an innerguard inside wall 665 of the inner guard 135 inside an outer edge 185and an inner guard inside end 235. The comb inside wall 645 is adjacentto the sharp blade 115 and inside the inside edge 195 and sharp edge 125of the sharp blade 115 in order to be a barrier for a skin convex duringa shaving stroke. Inner guard inside end 235 is embodied where the innerguard 135 and the sharp blade 115 meet. An inside portion of the outercomb 145 removed in order to create a deep void 165. The sharp blade 115is fixedly anchored on a sharp blade end 225 opposite the sharp edge 125of the sharp blade 115. A base 205 is positioned to create a level ofdistance between said base 205 and the sharp edge 125 of the sharp blade115 in order to enable a controlled level of flexibility with the sharpblade 115. The deep void 165 is spaced intermediately of the outer comb145 and sharp blade 115. Deep void 165 thickness allowing a level ofcontrol over the flexibility of the sharp blade 115 as well asover-exposure of the sharp blade 115. Deep void 165 having a thicknesswhich is represented as K. Thickness K of deep void 165 is about 0.7262millimeters or less. In a preferred embodiment distance K is 0.381millimeters. Thickness K of deep void 165 may run thicker but the dangerof enabling the sharp blade 115 to become like a dagger in relation tothe skin surface becomes increasingly probable. The level of distance ofthe deep void 165 between the base 205 and the sharp edge 125 of thesharp blade 115 is referenced as L. The distance L is about 4.57millimeters or less. A preferred distance of distance L is about 2.03millimeters. Distance L may be less or greater than the preferreddistance.

An inner rearward distance B from the sharp edge 125 of the sharp blade115 to the inner guard edge of the inner guard 135 in relation to anouter rearward distance N from the inside edge 195 of the outer comb 145to the sharp edge 125 of the sharp blade 115 has a ratio of about 1. Inother words, in this embodiment, the inner rearward distance B and theouter rearward distance N are substantially the same. The inner rearwarddistance B from the sharp edge 125 of the sharp blade 115 to the innerguard edge of the inner guard 135 is about 0.508 mm to about 1.016 mm Apreferred inner rearward distance B from the sharp edge 125 of the sharpblade 115 to the inner guard 135 is about 0.762 mm. Also, the outerrearward distance N from the inside edge 195 of the outer comb 145 tothe sharp edge 125 of the sharp blade 115 is about 0.508 mm to about1.016 mm A preferred outer rearward distance N from the inside edge 195to the sharp edge 125 is about 0.762 mm. In this discussion of anadditional embodiment the diagonal distance 985, diagonal distance J,and diagonal distance G are also affected and have alternate dimensionsas well. Diagonal distance 985 may be about 1.54 mm to about 2.54 mm Apreferred diagonal distance 985 is about 2.3622 mm. Diagonal distance Jmay be about 0.762 mm to 1.6 mm A preferred distance J is about 1.4986mm Diagonal distance G may be about 0.254 mm to about 0.889 mm. Apreferred diagonal distance G is about 0.8636 mm. Furthermore, the innerguard 135 has an inside end 235 and an outer edge 185 wherein thedistance between the inner guard 135 inside end 235 and the outer edge185 is considered the inner guard 135 inside wall 665. The inside wall665 distance is referenced as distance DD. Distance DD is about 0.381 mmto about 0.889 mm A preferred distance DD is about 0.61 mm. The distanceDD is the same or greater than a thickness “K” of a deep void 165. Notethat diagonal distance J is substantially equal or greater than distanceG. Note that the skin convex enters and stretches inside of the outeredge 185 and inside edge 195 it is preferable to have a greater diagonaldistance J in comparison to diagonal distance G. Having a greaterdiagonal distance J allows the stretching skin convex to press againstthe sharp blade 115 and bending the sharp blade 115 towards the insideof the outer comb 145. If diagonal distance J was less than diagonaldistance G the skin convex will have a harder time pressing the sharpblade 115 towards the inside of the outer comb 145 and the sharp blade115 becomes more likely to poke into the skin as a dagger instead of atan cutting angle between the sharp edge 125 of the sharp blade 115 andthe skin surface.

The inner edge of the inner guard 135 and the inside edge 195 of theouter comb 145 in practice are blunt or curved edges because no corneris perfectly sharp or square. If the inner edge of the inner guard 135and the inside edge 195 of the outer comb 145 were perfectly sharp orsquare, they would risk cutting into the skin or feel uncomfortable.That being said, there may be at a slightly square edge sufficient toindent and grip the skin in order for the skin inside of the inside edge195 and the inner guard 135 to stretch. These ends are the outermosthorizontal dimension to the end or tip of the inner guard 135 or theouter comb 145. Therefore the inner rearward distance B and outerrearward distance N are stated measured from respective ends of theinner guard 135 and the outer comb 145.

It should be understood that outer comb inside wall 645 creates abarrier for a skin surface convex to enter inside of the inside edge 195and outer edge 185. The outer comb 145 having an outer wall 155 which inanother embodiment may also be rounded with an arc instead of a straightwall. The midpoint of a portion of the non-flexing sharp blade 115 isreferred to as midpoint H which is illustrated with a straight or flatdashed line. In FIGS. 53-55 the inner guard 135 and outer comb 145 arenot indenting into the skin surface A and thus the sharp blade 115 isnot pressing against the skin surface A and the sharp blade 115 is notflexing.

As seen in FIGS. 53-55 a portion of the inner guard 135 inside of theouter edge 185 and sharp edge 125 is removed in order to create atrailing opening J inside of outer edge 185 and a sharp edge 125 of asharp blade. In FIGS. 53-55 the trailing opening J is illustrated as adashed triangle inside of the outer edge 185 of the inner guard 135 andthe sharp edge 125 of the sharp blade 115. The trailing opening J crosssectional has three triangular corners or vertices which have threewalls but it is not a perfect triangle being that the three walls orsides of the vertices are not always flat. This is especially true ofthe sharp blade 115 and the skin surface A which both flex underpressure. The sharp blade 115, which forms one of the walls or sides,will flex and bend which is key in situations where a less rigid bladeis necessary to create a softer shaver against a skin surface A. Theinner guard inside wall 665 of inner guard 135 which starts from theouter edge 185 and ends at the inner guard inside end 235 of the innerguard 135 creates a second wall or side. The inner guard inside wall 665of inner guard 135 does not need to be a straight wall but in anotherembodiment may be rounded with an arc. The skin surface A is the thirdand final wall or side which also deforms and will convex. The skinsurface A starts from the sharp edge 125 and ends at the outer edge 185.The trailing opening J allows the skin to deform and tighten itself inorder for the sharp blade 115 to access the base of a hair which resultsin a shave that leaves a smooth skin surface after a shaving stroke. InFIGS. 53-55 the first of the vertices is where the inner guard insideend 235 and the sharp blade 115 meet. The second of the vertices iswhere the sharp blade 115 and the skin surface plane A intersect. Thesecond vertices may also be where the sharp edge 125 of the sharp blade115 and the skin surface plane A meet. The third of the vertices iswhere the skin surface A and the outer edge 185 of the inner guard 135meet. The vertices work to together to form the planes that createtrailing opening J or void allowing for a sufficient opening or void fortightening skin to enter and convex. It should also be known that theinner guard inside wall 665 controls the amount of skin convex allowedinside as does the outer comb inside wall 645. In FIGS. 53-55 thetrailing opening J allows for a sufficient void or space for tighteningskin to enter and convex in order for the sharp blade 115 to gain accessto a base of a hair. A leading opening G is inside of the inside edge195 and the sharp edge 125 of the sharp blade 115. Leading opening Gallows a sufficient opening in order for a skin convex to safely pressagainst the sharp edge 125 of the sharp blade 115 when pressing theblade group 265 against the skin surface A. In FIGS. 53-55 the bladegroup 265 is not yet pressing into the skin surface A and thus the sharpblade 115 is illustrated in a stationary position.

The first dimension of opening G across the gap thickness K measureddiagonally between the sharp edge 125 of the sharp blade 115 and theinside edge 195 of the outer comb 145 is less than or equal to a seconddimension of the opening J inside the inner guard 135 measureddiagonally between the sharp edge 125 of the sharp blade 115 and theouter edge 185 of the inner guard 135. The leading opening G is insidethe inside edge 195 of the outer comb 145 and the sharp edge 125 of thesharp blade 115. The distance of G is the diagonal distance between theinside edge 195 of the outer teeth 145 and the outer edge 185 of innerguard 135 and is about 1.524 millimeters or less. A preferred distanceof G or the diagonal distance between the inside edge 195 of the outerteeth 145 and the outer edge 185 of the inner guard 135 is about 0.889millimeters.

The trailing opening J inside the outer edge 185 of the inner guard 135and the sharp edge 125 of the sharp blade 115. The distance of J is thediagonal distance between the outer edge 185 of inner guard 135 and thesharp edge 125 of the sharp blade 115 and is about 1.905 millimeters. Apreferred distance of J or a diagonal distance between the outer edge185 of the inner guard 135 and the sharp edge 125 of the sharp blade 115is about 1.4224 millimeters.

A diagonal distance inside the inside edge 195 of the outer comb 145 andthe outer edge 185 of the inner guard 135 is referenced as distance 985.Distance 985 is 2.286 or less. A preferred distance of 985 or thediagonal distance between the inside edge 195 of the outer teeth 145 andthe outer edge 185 of inner guard 135 is about 1.7272 millimeters.

Note that in FIGS. 53-55 the angle of the outer edge 185 and the insideedge 195 in relation to the midpoint H is referred to angle 995. Angle995 may be 40 degrees or less. A preferred angle of angle 995 is about20 degrees. FIGS. 53-55 illustrates a range of alternate angle thatangle 995 may take form. For instance, in FIG. 53 angle 995 is 20degrees, in FIG. 54 angle 995 is 30 degrees while in FIG. 55 angle 995is 40 degrees.

An angle between the skin plane A and the outer wall 155 of outer comb145 is referenced as vertex O. Vertex O is an angle created in order toallow the outer comb 145 to better indent into the skin surface Aallowing the blade group 265 to shave properly.

FIGS. 56-57 illustrates close up views of a blade group rear surface 625of a blade group 265 having a top side 595, a bottom side, 605 whereinthe top side 595 is facing a skin plane A opposite the bottom side 605.The blade group 265 having an outer comb 145 with an inside edge 195 anda sharp blade 115 with a sharp edge 125 and the sharp blade 115 isopposite the blade group rear surface 625. As can be seen in FIGS. 56-57the outer comb 145 having a tooth end 775, a tooth length 785 and atooth width 795 wherein the tooth length 785 illustrates the length ofthe outer teeth 145 or outer comb 145 stretching from the tooth end 775to the inside edge 195 of the outer comb 145. The tooth width 795illustrates the width of the opening gap inside of at least two teeth145. In FIG. 56 it can be seen that hair 415 is illustrated inside ofthe tooth end 775 and the sharp edge 125 of the inside edge 195.Although in FIG. 56 the blade group 265 is not pressing into the skinplane A it can be seen that the hair 415 may move inside of the toothend 775 and the inside edge 195 when approaching the skin surface Awhich often times may cause hair 415 to clog and get stuck inside of theblade group 265 after being shorn as in FIG. 57. In order for a user toeasily clean the blade group 265 with a cleaning brush it is preferredthat the tooth end 775 be inside of the sharp edge 125 of the sharpblade 115 as illustrated in FIGS. 56-57. As it can be seen in FIG. 57after the user has performed a shaving stroke the hairs 415 havecollected inside of the tooth end 775 and inside edge 195. However,since the tooth length 785 stretching from the inside edge 195 to thetooth end 775 inside the sharp edge 125 the user is able to access allof the shorn hairs collected inside the sharp blade 115 and outer comb145.

FIGS. 58-59 illustrate an eye-level view of the bottom side 345 of asafety razor 105 for two-point discrimination according to an embodimentwhere a blade group 265 has a sharp blade 115 and an inner guard 135parallel to the sharp blade 115 on a trailing side of the sharp blade115 opposite the outer comb 145 wherein an outer comb 145 parallel tothe sharp blade 115 on a leading side of the sharp blade 115 and asubstrate structure 215 having a groove 305 and adapted to hold theblade group 265 and a support on the front surface 375 of the substratestructure 215 opposite a rear surface 385. In FIGS. 58-39 the bladegroup 265 having a left attachment side 545 and a right attachment side555 wherein the left attachment side 545 is opposite the rightattachment side 555 and a user's hand, which is illustrated with adashed line, is removably holding the right attachment side 555 andsliding said blade group 265 along a substrate structure 215 and towardsa safety razor left side 505 of the blade group 265 and is sliding theblade group 265 into the groove 305. In the illustration in FIGS. 58-39the groove 305 of substrate structure 215 having a track 705 while ablade group 265 having a track attachment slot 715 close to the bottomside 605 of the blade group 265 which may have an opening in order forthe track 705 to insert into the track attachment slot 715 while abottom side 605 opposite a top side 595 of the blade group 265 isentering the groove 305 from the safety razor right side 515 opposite asafety razor left side 505. Track attachment slot 715 may have a trackattachment secondary slot 725 as illustrated in FIGS. 58-59. The bladegroup 265 top side 595 is opposite the bottom side 605 and the top side595 is a portion of the blade group 265 touching a skin surface of auser during a shaving stroke during two-point discrimination. The lengthof the blade group 265 or a support 275 referenced as support length 575is the length of the blade group 265 or support 275 inside of the leftattachment side 545 and the right attachment side 555. The length of thesupport length 575 is about 36.322 millimeters or greater. A preferredsupport length 575 is about 72.644 millimeters.

A substrate structure 215 having an anchor 695 and a lock and releaselever 755 with a spring 765 that when said lock and release lever 755 ispushed in a container 745 by a user the anchor 695 may move towards therear surface 385 of the safety razor 105 and when a user releases thelock and lock and release lever 755 the spring 765 will move the anchor695 may move towards the front surface 375 of a safety razor 105. Inanother embodiment the anchor 695 may move towards the safety razor leftside 505 or the safety razor right side 515. As seen in FIG. 59 thisfunctionality allows the anchor 695 to move inside the track attachmentsecondary slot 725 when the anchor 695 moves into the track attachmentsecondary slot 725 the blade group 265 or support are removablyinterlocking with substrate structure 215 forming the safety razor 105for two-point discrimination. As seen in FIG. 59 the anchor 695 isremovably interlocking with the track attachment secondary slot 725which small arrows are illustrating the spring 765 has allowed theanchor 695 to snap into the track attachment secondary slot 725. Itshould be stated that in another alternate embodiment, the leftattachment side 545 and right attachment side 555 of a safety razor 105may simultaneously removably attach into place with the safety razorleft side 505 and the safety razor right side 515 when entering from thefront surface 375 of the safety razor 105. In yet another embodiment thelock and release lever 755, spring 765 and anchor 695 may interlock witha blade group 265 and support 275 which are one piece and not separate.In another embodiment a lock and release lever 755, spring 765 andanchor 695 may be embodied on the safety razor right side 515 opposite asafety razor left side 505 or on the front surface 375 or rear surface385 of the safety razor 105. In yet another embodiment, the handleattachment 295 on the rear surface 385 of a substrate structure 215having a handle clip insert 635 for when attaching a safety razor 105 toan elongated handle for shaving. In FIG. 59 is an illustration wherein auser has completely attached the blade group 265 to the substratestructure 215. As seen in FIG. 59 a secondary anchor 735 may be embodiednear the right attachment side 555 of the substrate structure 215interlocking the blade group 265 or in another embodiment a support 275into place. In another embodiment the secondary anchor 735 may be on theleft attachment side 545. Also, in alternate embodiments the other partsfound in FIGS. 58-59 be may located on opposite side of ends of thesubstrate structure 215 and will still perform effectively.

FIG. 60 illustrates a front view of an alternate embodiment of a safetyrazor 105 with a skeletal structure. The safety razor 105 has a top side335, a bottom side 345, a safety razor left side 505, a safety razorright side 515, wherein the top side 335 is opposite the bottom side 345and the safety razor left side 505 is opposite the safety razor rightside 515. The safety razor 105 having a front surface 375 with a bladegroup 265 and a support 275 wherein the blade group 265 and support 275are separated with a tactile discrimination distance 285 at a distancesufficient for two-point discrimination. In FIG. 60 the support 275 isembodied as a blade group and both blade group 265 and support 275having a sharp blade 115 inside an inner guard 135 and outer comb 145.In FIG. 60 the safety razor 105 is has a skeletal structure whichmultiple safety razor skeletal openings 996. Having a skeletal structureoffers a light weight safety razor 105 which may be more efficient forshaving as well as saves cost in manufacturing due to the absent amountof material that is saved. The safety razor 105 having a handleattachment 295 that can be seen through at least one safety razorskeletal opening 996 on the rear surface of the safety razor 105opposite the front surface 375. Furthermore, illustrated are fingerdepressions 405 near the bottom side 345 of the safety razor 105.

In FIG. 61 illustrates a chart depicting the many level of distances tocreate two-point discrimination on the human male body locations inwhich these distances are performed in order for effective two-pointdiscrimination communication. FIG. 61 is a graphical representation ofthe data represented in Table 1 discussed above with respect to FIGS. 27and 28. The different parts of the body illustrated in FIG. 61 are the ahallux 805, a sole 815, a calf 825, a thigh 835, a belly 845, a back855, a breast 865, a upper lip 875, a shoulder 885, a nose 935, aforehead 905, a forearm 915, a upper arm 925, a cheek 895, a palm 945and fingers 955.

FIGS. 62-63 illustrate close up side views of an elongated back shaverhandle 315 and a safety razor 105 removably attaching to the elongatedback shaver handle 315 with a pivot mechanism 296 according toembodiments of the present inventions. The elongated handle 315 isgenerally an s-shaped elongated member 315 having a surface along alength of the elongated handle 315 defining a blade end 325. The safetyrazor 105 having a front surface 375 and a rear surface 385 wherein thefront surface 375 is opposite the rear surface 385 and in FIGS. 42-43the rear surface 385 if facing the elongated back shaver handle 325. Ahandle attachment 295 is on the rear surface 385 of the substratestructure 215 and removably attaching the safety razor 105 with thehandle 315. A pivot mechanism 296 is located near the blade end 325 andallowing the safety razor 105 to move and pivot at alternate angles whenpressed against a skin surface A. In an alternate embodiment the pivotmechanism 296 can also be embodied closer or further from the rearsurface 385 of the substrate. Also, in another alternate embodiment thepivot mechanism 296 may also be located entirely on the safety razor 105or the handle 315 or may be located on both in order to have the pivotwork properly in allowing the safety razor 105 to pivot at alternateangles when pressed against the skin. The handle 315 having a handleclip 365 to lock and release the safety razor 105 for tactile feedbackin the handle attachment 295. The safety razor having a top side 335 anda bottom side 345 wherein the top side 335 is opposite the bottom side345.

The safety razor 105 has a blade group 265 and the support 275 spaced adistance sufficient to achieve tactile feedback on the flat skin plane Aof a user and a tactile discrimination distance 285 between the bladegroup 265 and support 275. A tactile discrimination distance 285 is anydistance gap spaced inside of at least the blade group 265 and thesupport 275 and the tactile discrimination distance 285 may have a deepor shallow elevation which is referenced as elevation gap EE. Thetactile discrimination distance 285 may be a tactile distance fortwo-point discrimination. In FIGS. 42-43 the support 275 takes the forma blade group and each blade group comprising a sharp blade 115 with asharp edge 125 and an inner guard 135 parallel to the sharp blade 115with an outer edge 185 on a trailing side of the sharp blade 115opposite an outer comb 145 having an inside edge 195 wherein the outercomb 145 parallel to the sharp blade 115 on a leading side of the sharpblade 115 and a substrate structure 215 adapted to hold the blade group265 and the support 275 on a front surface 375 of the substratestructure 215 with the blade group 265 and support 275 spaced a distancesufficient to achieve two-point discrimination on the skin of a userbetween the blade group 265 and support 275. A trailing opening J isinside the sharp blade 115 and the inner guard 135 while the leadingopening G is inside the inside edge 195 and the sharp edge 125.

Although the invention is described herein with reference to specificembodiments, various modifications and changes can be made withoutdeparting from the scope of the present inventions as set forth in theclaims below. Accordingly, the specification and figures are to beregarded in an illustrative rather than a restrictive sense, and allsuch modifications are intended to be included within the scope of thepresent inventions. They can have different configurations than theexamples illustrated in the drawings. Any benefits, advantages, orsolutions to problems that are described herein with regard to specificembodiments are not intended to be construed as a critical, required, oressential feature or element of any or all the claims.

Any letter designations such as (a) or (b) etc. used to label steps ofany of the method claims herein are step headers applied for readingconvenience and are not to be used in interpreting an order or processsequence of claimed method steps. Any method claims that recite aparticular order or process sequence will do so using the words of theirtext, not the letter designations.

Unless stated otherwise, terms such as “first” and “second” are used toarbitrarily distinguish between the elements such terms describe. Thus,these terms are not necessarily intended to indicate temporal or otherprioritization of such elements.

What is claimed is:
 1. A back shaver, comprising: an elongated backshaver handle defining an inner side and an outer side and a blade endand a handle end, the outer side opposite the inner side, the blade endopposite the handle end; a grip defined by at one of the inner and outersides at the handle end of the elongated back shaver handle; and acoupling having a first side and a second side opposite the first side,the first side of the coupling coupled to the inner side at the bladeend of elongated back shaver handle; and a blade cartridge comprising asharp blade with a sharp edge, the blade cartridge coupled to the secondside of the coupling with the sharp edge of the sharp blade to face awayfrom the inner side of the elongated back shaver handle, wherein theblade cartridge further comprises an outer comb comprising an insideedge, and an inner guard comprising an inner guard edge and a trailingopening between inner guard edge and the sharp blade and a leadingopening inside of the inside edge of outer comb and the sharp blade; andwherein the coupling allows for the cartridge to move in relation to theelongated back shaver handle.
 2. A back shaver according to claim 1,wherein the coupling comprises a material that would allow the bladecartridge to pivot with respect to the elongated back shaver handle. 3.A back shaver according to claim 1, wherein the coupling comprisesrubber or another flexible material.
 4. A back shaver according to claim1, wherein the coupling is a pivot member allowing the blade cartridgeto pivot in relation to the elongated back shaver handle.
 5. A backshaver according to claim 4, wherein the pivot member is located atleast on the blade cartridge.
 6. A back shaver according to claim 4,wherein the pivot member is located on at least the inner side at theblade end of elongated back shaver handle.
 7. A back shaver according toclaim 4, wherein the pivot member is a ball protrusion on the bladecartridge, the elongated back shaver handle having a recessed socket toreceive the ball protrusion to define a ball joint.
 8. A back shaveraccording to claim 7, wherein the recessed socket tapers narrower as itextends away from the blade cartridge.
 9. A back shaver according toclaim 7, wherein the sharp blade is a flexible sharp blade, wherein thesharp edge faces away from the inner side of the elongated back shaverhandle, and wherein the sharp edge of the sharp blade longitudinallybends relatively more parallel to a skin surface when the elongated backshaver handle presses the inside edge and the inner guard edge of theblade cartridge into the skin surface during shaving of hair.
 10. A backshaver according to claim 1, wherein the blade cartridge comprisesanother sharp blade spaced from and parallel to the sharp blade, whereinthe another sharp blade comprises another sharp edge facing away fromthe inner side of the elongated back shaver handle, and furthercomprises another outer comb comprising another inside edge, and anotherinner guard comprising another inner guard edge and another trailingopening between another inner guard edge and the another sharp blade andanother leading opening inside of the another inside edge of the anotherouter comb and the another sharp blade.
 11. A back shaver according toclaim 1, wherein the blade cartridge comprises another sharp bladespaced from and parallel to the sharp blade with the another sharp edgeof the another sharp blade facing away from the inner side of theelongated back shaver handle.
 12. A back shaver according to claim 1,wherein the coupling allows for the cartridge to move radially inrelation to the elongated back shaver handle.